On Sat, 23 Oct 2004 23:38:58 GMT, "dave AKA vwdoc1" <vwdoc1@ameritech.net>
wrote:

>8-10 seconds is a little too long. Maybe 3-4 seconds is what I consider
>normal even after sitting for weeks.
>
>Might be a fuel problem. Have you buddy try to cycle the ign key on and off
>a few times and he should hear the fuel pump prime the system and then see
>if the starting time lessens.
>
>Might be a CPS (crankshaft position sensor) problem. Have you buddy clean
>the CPS terminals at the harness plug and also tighten them. Apply some
>di-electric grease to the terminals too. See if that helps. ;-)
>
>Of course the distributor may need indexing too since the history is unknown
>on this Jeep.
>Was a "tune-up" done? Plugs, cap, rotor, plug wires, filters, etc.?
>
>later,
>dave AKA vwdoc1
>88 XJ 4.0 auto
>
>
>> Jeff Falkiner wrote:
>>>
>>> A good buddy recently bought a 1990 Cherokee Limited with the 4.0 litre
>>> inline 6.
>>> Every time he tries to start it after it's sat for awhile it takes a
>>> looong
>>> time to finally fire. Time is 8-10 seconds. With winter coming, he's
>>> concerned with keeping enough battery capacity available on cold Canadian
>>> winter mornings.
>>>
>>> Any quick things we should check out over a couple of Canadian beers?
>>> The
>>> truck has just over 50K miles and is otherwise in fantastic shape.
>


The service bulletin from Jeep about the CPS says to change the CPS AND
wire the CPS connection directly to the computer, bypassing the large
connecter directly above the brake booster.

While problems can come from a bad CPS, it is the high resistance at the
CPS connection within the large plug and socket that should be resolved
before replacing the CPS.

You should check the resistance within the CPS at varying temperatures (use
a hair dryer or heat gun) as part of the troubleshooting if a hard start-no
start-die out condition.

If the CPS seems OK, unplug the connector above the brake booster and clean
the connections for the CPS.
--

Dave in Columbus

 

and that kit the Dave in Columbus is talking about is only around $23 or so
and it is the CPS too!
My local dealer has never sold this kit, but I researched the price from
galeana auto group.

FYI Regular CPS is around $50.

later,
dave AKA vwdoc1

"Dave in Columbus" <drm315@hotmail.com> wrote
>
> The service bulletin from Jeep about the CPS says to change the CPS AND
> wire the CPS connection directly to the computer, bypassing the large
> connecter directly above the brake booster.
>
> While problems can come from a bad CPS, it is the high resistance at the
> CPS connection within the large plug and socket that should be resolved
> before replacing the CPS.
>
> You should check the resistance within the CPS at varying temperatures
> (use
> a hair dryer or heat gun) as part of the troubleshooting if a hard
> start-no
> start-die out condition.
>
> If the CPS seems OK, unplug the connector above the brake booster and
> clean
> the connections for the CPS.
> --
>
> Dave in Columbus

 

and that kit the Dave in Columbus is talking about is only around $23 or so
and it is the CPS too!
My local dealer has never sold this kit, but I researched the price from
galeana auto group.

FYI Regular CPS is around $50.

later,
dave AKA vwdoc1

"Dave in Columbus" <drm315@hotmail.com> wrote
>
> The service bulletin from Jeep about the CPS says to change the CPS AND
> wire the CPS connection directly to the computer, bypassing the large
> connecter directly above the brake booster.
>
> While problems can come from a bad CPS, it is the high resistance at the
> CPS connection within the large plug and socket that should be resolved
> before replacing the CPS.
>
> You should check the resistance within the CPS at varying temperatures
> (use
> a hair dryer or heat gun) as part of the troubleshooting if a hard
> start-no
> start-die out condition.
>
> If the CPS seems OK, unplug the connector above the brake booster and
> clean
> the connections for the CPS.
> --
>
> Dave in Columbus

 

and that kit the Dave in Columbus is talking about is only around $23 or so
and it is the CPS too!
My local dealer has never sold this kit, but I researched the price from
galeana auto group.

FYI Regular CPS is around $50.

later,
dave AKA vwdoc1

"Dave in Columbus" <drm315@hotmail.com> wrote
>
> The service bulletin from Jeep about the CPS says to change the CPS AND
> wire the CPS connection directly to the computer, bypassing the large
> connecter directly above the brake booster.
>
> While problems can come from a bad CPS, it is the high resistance at the
> CPS connection within the large plug and socket that should be resolved
> before replacing the CPS.
>
> You should check the resistance within the CPS at varying temperatures
> (use
> a hair dryer or heat gun) as part of the troubleshooting if a hard
> start-no
> start-die out condition.
>
> If the CPS seems OK, unplug the connector above the brake booster and
> clean
> the connections for the CPS.
> --
>
> Dave in Columbus

 

I've researched this for mine and I found that the crank sensor is often
the problem. I replace it, and the problem went away.

 

I've researched this for mine and I found that the crank sensor is often
the problem. I replace it, and the problem went away.

 

I've researched this for mine and I found that the crank sensor is often
the problem. I replace it, and the problem went away.