On Fri, 23 Mar 2007 19:35:18 -0400, Mike Romain <romainm@sympatico.ca>
wrote:

>Mike Romain wrote:
>> SnoMan wrote:
>>> On Fri, 23 Mar 2007 12:17:33 -0400, Mike Romain <romainm@sympatico.ca>
>>> wrote:
>>>
>>>> Then you normally talk a series of backfires or 'pops', not one bang
>>>> and stop that is 'caused' by a slight trace of hydrocarbons in the
>>>> rad coolant most likely from a cracked head!!!!
>>>
>>>
>>> Not always because depending on the reason for the lean out when the
>>> engine missfired and back fires it looses power and required fuel flow
>>> so demand for it decreases and it may run alright for a bit afterwards
>>> when it recovers. Also something this backfire can occur when there is
>>> a throttle change and enrichment lags enough to cause the "pop" from
>>> lean out. This iis not to say it could not be ignition but more often
>>> than not when it spits through intake it is from leanout under load or
>>> engine acceleration.
>>> -----------------
>>> TheSnoMan.com
>>
>> "Caused by a slight trace of hydrocarbons in the coolant which means a
>> cracked head"????????????
>>
>> We are talking a bang that stopped the engine cold at speed twice in a
>> row to the point of a tow...
>
>Can we say it sounds like the center coil wire came loose?

Maybe but at same time a serious backfire through intake can kill a
engine and damage injectors (and some sensors) and sometimes carbs.
Again I am not rulling out you idea it is just I have seen some real
serious back fires in my life and some that caused damage to point
engine would not run until it was repaired.

>
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page)
-----------------
TheSnoMan.com

 

Mike and SnoMan,
The jeep runs ok now.
Here's what the mechanic found (after a couple hundred dollars worth of
diagnosis):
He believes when I hooked up the Brake Booster (mentioned in another post)
which by the way leaks, this caused a lean condition on the engine and
caused it to backfire.
However he says there are hydrocarbons in the cooling system, which leads
him to believe one of my heads is cracked.
He asked if I wanted to replace the heads, I told him no thanks, if the Jeep
runs, that's fine by me. So now it runs fine.

Gents, thanks for all your assistance. I'll just drive the Jeep for now.
The heads will have to wait until I get some cash.


"SnoMan" <admin@snoman.com> wrote in message
news:713903tjrl7jr89na49mjsdv1b5vvm80ve@4ax.com...
> On Fri, 23 Mar 2007 19:35:18 -0400, Mike Romain <romainm@sympatico.ca>
> wrote:
>
>>Mike Romain wrote:
>>> SnoMan wrote:
>>>> On Fri, 23 Mar 2007 12:17:33 -0400, Mike Romain <romainm@sympatico.ca>
>>>> wrote:
>>>>
>>>>> Then you normally talk a series of backfires or 'pops', not one bang
>>>>> and stop that is 'caused' by a slight trace of hydrocarbons in the
>>>>> rad coolant most likely from a cracked head!!!!
>>>>
>>>>
>>>> Not always because depending on the reason for the lean out when the
>>>> engine missfired and back fires it looses power and required fuel flow
>>>> so demand for it decreases and it may run alright for a bit afterwards
>>>> when it recovers. Also something this backfire can occur when there is
>>>> a throttle change and enrichment lags enough to cause the "pop" from
>>>> lean out. This iis not to say it could not be ignition but more often
>>>> than not when it spits through intake it is from leanout under load or
>>>> engine acceleration.
>>>> -----------------
>>>> TheSnoMan.com
>>>
>>> "Caused by a slight trace of hydrocarbons in the coolant which means a
>>> cracked head"????????????
>>>
>>> We are talking a bang that stopped the engine cold at speed twice in a
>>> row to the point of a tow...
>>
>>Can we say it sounds like the center coil wire came loose?
>
> Maybe but at same time a serious backfire through intake can kill a
> engine and damage injectors (and some sensors) and sometimes carbs.
> Again I am not rulling out you idea it is just I have seen some real
> serious back fires in my life and some that caused damage to point
> engine would not run until it was repaired.
>
>>
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>> Canadian Off Road Trips Photos: Non members can still view!
>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>> (More Off Road album links at bottom of the view page)
> -----------------
> TheSnoMan.com

 

Mike and SnoMan,
The jeep runs ok now.
Here's what the mechanic found (after a couple hundred dollars worth of
diagnosis):
He believes when I hooked up the Brake Booster (mentioned in another post)
which by the way leaks, this caused a lean condition on the engine and
caused it to backfire.
However he says there are hydrocarbons in the cooling system, which leads
him to believe one of my heads is cracked.
He asked if I wanted to replace the heads, I told him no thanks, if the Jeep
runs, that's fine by me. So now it runs fine.

Gents, thanks for all your assistance. I'll just drive the Jeep for now.
The heads will have to wait until I get some cash.


"SnoMan" <admin@snoman.com> wrote in message
news:713903tjrl7jr89na49mjsdv1b5vvm80ve@4ax.com...
> On Fri, 23 Mar 2007 19:35:18 -0400, Mike Romain <romainm@sympatico.ca>
> wrote:
>
>>Mike Romain wrote:
>>> SnoMan wrote:
>>>> On Fri, 23 Mar 2007 12:17:33 -0400, Mike Romain <romainm@sympatico.ca>
>>>> wrote:
>>>>
>>>>> Then you normally talk a series of backfires or 'pops', not one bang
>>>>> and stop that is 'caused' by a slight trace of hydrocarbons in the
>>>>> rad coolant most likely from a cracked head!!!!
>>>>
>>>>
>>>> Not always because depending on the reason for the lean out when the
>>>> engine missfired and back fires it looses power and required fuel flow
>>>> so demand for it decreases and it may run alright for a bit afterwards
>>>> when it recovers. Also something this backfire can occur when there is
>>>> a throttle change and enrichment lags enough to cause the "pop" from
>>>> lean out. This iis not to say it could not be ignition but more often
>>>> than not when it spits through intake it is from leanout under load or
>>>> engine acceleration.
>>>> -----------------
>>>> TheSnoMan.com
>>>
>>> "Caused by a slight trace of hydrocarbons in the coolant which means a
>>> cracked head"????????????
>>>
>>> We are talking a bang that stopped the engine cold at speed twice in a
>>> row to the point of a tow...
>>
>>Can we say it sounds like the center coil wire came loose?
>
> Maybe but at same time a serious backfire through intake can kill a
> engine and damage injectors (and some sensors) and sometimes carbs.
> Again I am not rulling out you idea it is just I have seen some real
> serious back fires in my life and some that caused damage to point
> engine would not run until it was repaired.
>
>>
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>> Canadian Off Road Trips Photos: Non members can still view!
>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>> (More Off Road album links at bottom of the view page)
> -----------------
> TheSnoMan.com

 

Mike and SnoMan,
The jeep runs ok now.
Here's what the mechanic found (after a couple hundred dollars worth of
diagnosis):
He believes when I hooked up the Brake Booster (mentioned in another post)
which by the way leaks, this caused a lean condition on the engine and
caused it to backfire.
However he says there are hydrocarbons in the cooling system, which leads
him to believe one of my heads is cracked.
He asked if I wanted to replace the heads, I told him no thanks, if the Jeep
runs, that's fine by me. So now it runs fine.

Gents, thanks for all your assistance. I'll just drive the Jeep for now.
The heads will have to wait until I get some cash.


"SnoMan" <admin@snoman.com> wrote in message
news:713903tjrl7jr89na49mjsdv1b5vvm80ve@4ax.com...
> On Fri, 23 Mar 2007 19:35:18 -0400, Mike Romain <romainm@sympatico.ca>
> wrote:
>
>>Mike Romain wrote:
>>> SnoMan wrote:
>>>> On Fri, 23 Mar 2007 12:17:33 -0400, Mike Romain <romainm@sympatico.ca>
>>>> wrote:
>>>>
>>>>> Then you normally talk a series of backfires or 'pops', not one bang
>>>>> and stop that is 'caused' by a slight trace of hydrocarbons in the
>>>>> rad coolant most likely from a cracked head!!!!
>>>>
>>>>
>>>> Not always because depending on the reason for the lean out when the
>>>> engine missfired and back fires it looses power and required fuel flow
>>>> so demand for it decreases and it may run alright for a bit afterwards
>>>> when it recovers. Also something this backfire can occur when there is
>>>> a throttle change and enrichment lags enough to cause the "pop" from
>>>> lean out. This iis not to say it could not be ignition but more often
>>>> than not when it spits through intake it is from leanout under load or
>>>> engine acceleration.
>>>> -----------------
>>>> TheSnoMan.com
>>>
>>> "Caused by a slight trace of hydrocarbons in the coolant which means a
>>> cracked head"????????????
>>>
>>> We are talking a bang that stopped the engine cold at speed twice in a
>>> row to the point of a tow...
>>
>>Can we say it sounds like the center coil wire came loose?
>
> Maybe but at same time a serious backfire through intake can kill a
> engine and damage injectors (and some sensors) and sometimes carbs.
> Again I am not rulling out you idea it is just I have seen some real
> serious back fires in my life and some that caused damage to point
> engine would not run until it was repaired.
>
>>
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>> Canadian Off Road Trips Photos: Non members can still view!
>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>> (More Off Road album links at bottom of the view page)
> -----------------
> TheSnoMan.com

 

Thanks for the update.

I would just keep a close eye on the rad fluid to be sure it isn't
leaking into the engine.

I know lots of folks that use a bit of oil on the rad or heater hoses to
help them slip on. This will give a reading on a tester. So will using
an oil dirty funnel for coolant.

Mike

Anthony T wrote:
> Mike and SnoMan,
> The jeep runs ok now.
> Here's what the mechanic found (after a couple hundred dollars worth of
> diagnosis):
> He believes when I hooked up the Brake Booster (mentioned in another
> post) which by the way leaks, this caused a lean condition on the engine
> and caused it to backfire.
> However he says there are hydrocarbons in the cooling system, which
> leads him to believe one of my heads is cracked.
> He asked if I wanted to replace the heads, I told him no thanks, if the
> Jeep runs, that's fine by me. So now it runs fine.
>
> Gents, thanks for all your assistance. I'll just drive the Jeep for
> now. The heads will have to wait until I get some cash.
>
>

 

Thanks for the update.

I would just keep a close eye on the rad fluid to be sure it isn't
leaking into the engine.

I know lots of folks that use a bit of oil on the rad or heater hoses to
help them slip on. This will give a reading on a tester. So will using
an oil dirty funnel for coolant.

Mike

Anthony T wrote:
> Mike and SnoMan,
> The jeep runs ok now.
> Here's what the mechanic found (after a couple hundred dollars worth of
> diagnosis):
> He believes when I hooked up the Brake Booster (mentioned in another
> post) which by the way leaks, this caused a lean condition on the engine
> and caused it to backfire.
> However he says there are hydrocarbons in the cooling system, which
> leads him to believe one of my heads is cracked.
> He asked if I wanted to replace the heads, I told him no thanks, if the
> Jeep runs, that's fine by me. So now it runs fine.
>
> Gents, thanks for all your assistance. I'll just drive the Jeep for
> now. The heads will have to wait until I get some cash.
>
>

 

Thanks for the update.

I would just keep a close eye on the rad fluid to be sure it isn't
leaking into the engine.

I know lots of folks that use a bit of oil on the rad or heater hoses to
help them slip on. This will give a reading on a tester. So will using
an oil dirty funnel for coolant.

Mike

Anthony T wrote:
> Mike and SnoMan,
> The jeep runs ok now.
> Here's what the mechanic found (after a couple hundred dollars worth of
> diagnosis):
> He believes when I hooked up the Brake Booster (mentioned in another
> post) which by the way leaks, this caused a lean condition on the engine
> and caused it to backfire.
> However he says there are hydrocarbons in the cooling system, which
> leads him to believe one of my heads is cracked.
> He asked if I wanted to replace the heads, I told him no thanks, if the
> Jeep runs, that's fine by me. So now it runs fine.
>
> Gents, thanks for all your assistance. I'll just drive the Jeep for
> now. The heads will have to wait until I get some cash.
>
>

 

Mike,
the one thing I forgot to mention is anti-freeze does come out the overflow
cap tube when the engine has been running. The mechanic says it's caused by
the cracked head pressurizing my cooling system (he believes). I'm not so
sure. He added a bunch of anti-freeze to the radiator so I'm wondering if
the cooling system is trying to equalize, or find equilibrium. Having said
that, my temp gauge rarely goes beyond 1/3 (it never reaches half-way) and
it's been like that for years. thoughts.


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:46054efc$0$3985$9a6e19ea@unlimited.newshostin g.com...
> Thanks for the update.
>
> I would just keep a close eye on the rad fluid to be sure it isn't leaking
> into the engine.
>
> I know lots of folks that use a bit of oil on the rad or heater hoses to
> help them slip on. This will give a reading on a tester. So will using
> an oil dirty funnel for coolant.
>
> Mike
>
> Anthony T wrote:
>> Mike and SnoMan,
>> The jeep runs ok now.
>> Here's what the mechanic found (after a couple hundred dollars worth of
>> diagnosis):
>> He believes when I hooked up the Brake Booster (mentioned in another
>> post) which by the way leaks, this caused a lean condition on the engine
>> and caused it to backfire.
>> However he says there are hydrocarbons in the cooling system, which leads
>> him to believe one of my heads is cracked.
>> He asked if I wanted to replace the heads, I told him no thanks, if the
>> Jeep runs, that's fine by me. So now it runs fine.
>>
>> Gents, thanks for all your assistance. I'll just drive the Jeep for now.
>> The heads will have to wait until I get some cash.
>>

 

Mike,
the one thing I forgot to mention is anti-freeze does come out the overflow
cap tube when the engine has been running. The mechanic says it's caused by
the cracked head pressurizing my cooling system (he believes). I'm not so
sure. He added a bunch of anti-freeze to the radiator so I'm wondering if
the cooling system is trying to equalize, or find equilibrium. Having said
that, my temp gauge rarely goes beyond 1/3 (it never reaches half-way) and
it's been like that for years. thoughts.


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:46054efc$0$3985$9a6e19ea@unlimited.newshostin g.com...
> Thanks for the update.
>
> I would just keep a close eye on the rad fluid to be sure it isn't leaking
> into the engine.
>
> I know lots of folks that use a bit of oil on the rad or heater hoses to
> help them slip on. This will give a reading on a tester. So will using
> an oil dirty funnel for coolant.
>
> Mike
>
> Anthony T wrote:
>> Mike and SnoMan,
>> The jeep runs ok now.
>> Here's what the mechanic found (after a couple hundred dollars worth of
>> diagnosis):
>> He believes when I hooked up the Brake Booster (mentioned in another
>> post) which by the way leaks, this caused a lean condition on the engine
>> and caused it to backfire.
>> However he says there are hydrocarbons in the cooling system, which leads
>> him to believe one of my heads is cracked.
>> He asked if I wanted to replace the heads, I told him no thanks, if the
>> Jeep runs, that's fine by me. So now it runs fine.
>>
>> Gents, thanks for all your assistance. I'll just drive the Jeep for now.
>> The heads will have to wait until I get some cash.
>>

 

Mike,
the one thing I forgot to mention is anti-freeze does come out the overflow
cap tube when the engine has been running. The mechanic says it's caused by
the cracked head pressurizing my cooling system (he believes). I'm not so
sure. He added a bunch of anti-freeze to the radiator so I'm wondering if
the cooling system is trying to equalize, or find equilibrium. Having said
that, my temp gauge rarely goes beyond 1/3 (it never reaches half-way) and
it's been like that for years. thoughts.


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:46054efc$0$3985$9a6e19ea@unlimited.newshostin g.com...
> Thanks for the update.
>
> I would just keep a close eye on the rad fluid to be sure it isn't leaking
> into the engine.
>
> I know lots of folks that use a bit of oil on the rad or heater hoses to
> help them slip on. This will give a reading on a tester. So will using
> an oil dirty funnel for coolant.
>
> Mike
>
> Anthony T wrote:
>> Mike and SnoMan,
>> The jeep runs ok now.
>> Here's what the mechanic found (after a couple hundred dollars worth of
>> diagnosis):
>> He believes when I hooked up the Brake Booster (mentioned in another
>> post) which by the way leaks, this caused a lean condition on the engine
>> and caused it to backfire.
>> However he says there are hydrocarbons in the cooling system, which leads
>> him to believe one of my heads is cracked.
>> He asked if I wanted to replace the heads, I told him no thanks, if the
>> Jeep runs, that's fine by me. So now it runs fine.
>>
>> Gents, thanks for all your assistance. I'll just drive the Jeep for now.
>> The heads will have to wait until I get some cash.
>>