I'm calling them in 20 minutes....May have an answer soon
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c6jf5a$ccbup$1@ID-193866.news.uni-berlin.de...
> Isn't this just about standard running procedures with the MPI Kit? Mine
> also does it and I've read a lot of others have it. I either try to toe
tap
> it through the warm up or just let it die the first time and after that
it's
> all right.
>
> I have heard a sound like sucking on a straw up to a certian point when
> starting and after that no which leads me to believe it's some kind of
> vacuum problem. But I have never figured it out, yet.
>
> You could call Hesco and ask them. Maybe they've come up with something
by
> now.
>
> Bill
>
>
>
> "Richard Harris" <SHARRIS11nospam@san.rr.com> wrote in message
> news:RZajc.8989$IO6.1804@twister.socal.rr.com...
> > Thanks again for the welcome back. I'm having some problems with my
MOPAR
> > fuel injection on my 258. It runs great once it's warmed up but upon
first
> > start in the morning it runs like crap. (not sure how crap really runs
but
> > its the best familyish word I can come up with right now.)
> > As long as I keep my foot in it its ok but if I just fire up the engine
> and
> > don't use the skinny pedal, it sputters and dies at least once. I can't
> find
> > any vacuum leaks. I checked by spraying WD on all connections including
> > manifolds. I'm running 92 octane as recomended by MOPAR. The engine was
> > rebuilt recently (before deployment) with basically all new guts. It's
> done
> > this since the install/rebuild. Any takers on what could be the problem?
> > Thanks in advance for the advice..
> > Rich Harris
> > 86CJ7: Mopar MPFI, Detroit locker, 31 BFG AT's(for now) 1" body lift,
Got
> > money left over from deployment and it's going into gears, a front
locker,
> > Rubicon Express 2-1/2" YJ springs, one piece axles, and 33" BFG MT's.
LIFE
> > IS GOOD!
> >
> >
>
>

 

I'm calling them in 20 minutes....May have an answer soon
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c6jf5a$ccbup$1@ID-193866.news.uni-berlin.de...
> Isn't this just about standard running procedures with the MPI Kit? Mine
> also does it and I've read a lot of others have it. I either try to toe
tap
> it through the warm up or just let it die the first time and after that
it's
> all right.
>
> I have heard a sound like sucking on a straw up to a certian point when
> starting and after that no which leads me to believe it's some kind of
> vacuum problem. But I have never figured it out, yet.
>
> You could call Hesco and ask them. Maybe they've come up with something
by
> now.
>
> Bill
>
>
>
> "Richard Harris" <SHARRIS11nospam@san.rr.com> wrote in message
> news:RZajc.8989$IO6.1804@twister.socal.rr.com...
> > Thanks again for the welcome back. I'm having some problems with my
MOPAR
> > fuel injection on my 258. It runs great once it's warmed up but upon
first
> > start in the morning it runs like crap. (not sure how crap really runs
but
> > its the best familyish word I can come up with right now.)
> > As long as I keep my foot in it its ok but if I just fire up the engine
> and
> > don't use the skinny pedal, it sputters and dies at least once. I can't
> find
> > any vacuum leaks. I checked by spraying WD on all connections including
> > manifolds. I'm running 92 octane as recomended by MOPAR. The engine was
> > rebuilt recently (before deployment) with basically all new guts. It's
> done
> > this since the install/rebuild. Any takers on what could be the problem?
> > Thanks in advance for the advice..
> > Rich Harris
> > 86CJ7: Mopar MPFI, Detroit locker, 31 BFG AT's(for now) 1" body lift,
Got
> > money left over from deployment and it's going into gears, a front
locker,
> > Rubicon Express 2-1/2" YJ springs, one piece axles, and 33" BFG MT's.
LIFE
> > IS GOOD!
> >
> >
>
>

 

I'm calling them in 20 minutes....May have an answer soon
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c6jf5a$ccbup$1@ID-193866.news.uni-berlin.de...
> Isn't this just about standard running procedures with the MPI Kit? Mine
> also does it and I've read a lot of others have it. I either try to toe
tap
> it through the warm up or just let it die the first time and after that
it's
> all right.
>
> I have heard a sound like sucking on a straw up to a certian point when
> starting and after that no which leads me to believe it's some kind of
> vacuum problem. But I have never figured it out, yet.
>
> You could call Hesco and ask them. Maybe they've come up with something
by
> now.
>
> Bill
>
>
>
> "Richard Harris" <SHARRIS11nospam@san.rr.com> wrote in message
> news:RZajc.8989$IO6.1804@twister.socal.rr.com...
> > Thanks again for the welcome back. I'm having some problems with my
MOPAR
> > fuel injection on my 258. It runs great once it's warmed up but upon
first
> > start in the morning it runs like crap. (not sure how crap really runs
but
> > its the best familyish word I can come up with right now.)
> > As long as I keep my foot in it its ok but if I just fire up the engine
> and
> > don't use the skinny pedal, it sputters and dies at least once. I can't
> find
> > any vacuum leaks. I checked by spraying WD on all connections including
> > manifolds. I'm running 92 octane as recomended by MOPAR. The engine was
> > rebuilt recently (before deployment) with basically all new guts. It's
> done
> > this since the install/rebuild. Any takers on what could be the problem?
> > Thanks in advance for the advice..
> > Rich Harris
> > 86CJ7: Mopar MPFI, Detroit locker, 31 BFG AT's(for now) 1" body lift,
Got
> > money left over from deployment and it's going into gears, a front
locker,
> > Rubicon Express 2-1/2" YJ springs, one piece axles, and 33" BFG MT's.
LIFE
> > IS GOOD!
> >
> >
>
>

 

OK, I didn't realize there was a stepper motor on the throttle body. I
though fuel mixture on Multipoint Fuel injection is controlled by the
computer not a stepper motor. I'd think (there I go thinking again) that
I'd get a fault code if there was a problem with a sensor..No??

PS: 35's are not even in the picture. I feel they are just too big for a SWB
Jeep to run. I'm sure someone will flame me for it but that's my opinion.
With 31's and skill I've done some pretty good trails, Holcomb Creek and
Crabb Flats at Big Bear Ca. for example. My opinion is anything bigger than
33 then you start to run into CG and stablity problems, not to mention the
mods you have to do to be able to run tires of this size.
"Jerry McG" <gmcgeorge.remove@frontier.net> wrote in message
news:c6jfb9092n@enews3.newsguy.com...
> Assuming there's nothing weird like something loose, or the basic timing
not
> set right, this sounds like the idle stepper motor isn't boosting the idle
> speed when cold. Could be caused by a bad ECM, MAP or temp sensor, or just
a
> bad connection somewhere. I'd go back and be sure you've got good
> connections at the components, then run whatever MOPAR gave you in the way
> of diagnostic routines. Owners of these MOPAR EFI kits I've come across
> have raved about how well it performs, the Howell version too. Too bad
> they're so expensive, but they sure are a good retrofit item on the 258.
>
> Oh, also, FWIW, if you're ever going to consider 35's you should consider
> the RE 4.5" kit rather than the 2.5.
>
>

 

OK, I didn't realize there was a stepper motor on the throttle body. I
though fuel mixture on Multipoint Fuel injection is controlled by the
computer not a stepper motor. I'd think (there I go thinking again) that
I'd get a fault code if there was a problem with a sensor..No??

PS: 35's are not even in the picture. I feel they are just too big for a SWB
Jeep to run. I'm sure someone will flame me for it but that's my opinion.
With 31's and skill I've done some pretty good trails, Holcomb Creek and
Crabb Flats at Big Bear Ca. for example. My opinion is anything bigger than
33 then you start to run into CG and stablity problems, not to mention the
mods you have to do to be able to run tires of this size.
"Jerry McG" <gmcgeorge.remove@frontier.net> wrote in message
news:c6jfb9092n@enews3.newsguy.com...
> Assuming there's nothing weird like something loose, or the basic timing
not
> set right, this sounds like the idle stepper motor isn't boosting the idle
> speed when cold. Could be caused by a bad ECM, MAP or temp sensor, or just
a
> bad connection somewhere. I'd go back and be sure you've got good
> connections at the components, then run whatever MOPAR gave you in the way
> of diagnostic routines. Owners of these MOPAR EFI kits I've come across
> have raved about how well it performs, the Howell version too. Too bad
> they're so expensive, but they sure are a good retrofit item on the 258.
>
> Oh, also, FWIW, if you're ever going to consider 35's you should consider
> the RE 4.5" kit rather than the 2.5.
>
>

 

OK, I didn't realize there was a stepper motor on the throttle body. I
though fuel mixture on Multipoint Fuel injection is controlled by the
computer not a stepper motor. I'd think (there I go thinking again) that
I'd get a fault code if there was a problem with a sensor..No??

PS: 35's are not even in the picture. I feel they are just too big for a SWB
Jeep to run. I'm sure someone will flame me for it but that's my opinion.
With 31's and skill I've done some pretty good trails, Holcomb Creek and
Crabb Flats at Big Bear Ca. for example. My opinion is anything bigger than
33 then you start to run into CG and stablity problems, not to mention the
mods you have to do to be able to run tires of this size.
"Jerry McG" <gmcgeorge.remove@frontier.net> wrote in message
news:c6jfb9092n@enews3.newsguy.com...
> Assuming there's nothing weird like something loose, or the basic timing
not
> set right, this sounds like the idle stepper motor isn't boosting the idle
> speed when cold. Could be caused by a bad ECM, MAP or temp sensor, or just
a
> bad connection somewhere. I'd go back and be sure you've got good
> connections at the components, then run whatever MOPAR gave you in the way
> of diagnostic routines. Owners of these MOPAR EFI kits I've come across
> have raved about how well it performs, the Howell version too. Too bad
> they're so expensive, but they sure are a good retrofit item on the 258.
>
> Oh, also, FWIW, if you're ever going to consider 35's you should consider
> the RE 4.5" kit rather than the 2.5.
>
>

 

OK, I didn't realize there was a stepper motor on the throttle body. I
though fuel mixture on Multipoint Fuel injection is controlled by the
computer not a stepper motor. I'd think (there I go thinking again) that
I'd get a fault code if there was a problem with a sensor..No??

PS: 35's are not even in the picture. I feel they are just too big for a SWB
Jeep to run. I'm sure someone will flame me for it but that's my opinion.
With 31's and skill I've done some pretty good trails, Holcomb Creek and
Crabb Flats at Big Bear Ca. for example. My opinion is anything bigger than
33 then you start to run into CG and stablity problems, not to mention the
mods you have to do to be able to run tires of this size.
"Jerry McG" <gmcgeorge.remove@frontier.net> wrote in message
news:c6jfb9092n@enews3.newsguy.com...
> Assuming there's nothing weird like something loose, or the basic timing
not
> set right, this sounds like the idle stepper motor isn't boosting the idle
> speed when cold. Could be caused by a bad ECM, MAP or temp sensor, or just
a
> bad connection somewhere. I'd go back and be sure you've got good
> connections at the components, then run whatever MOPAR gave you in the way
> of diagnostic routines. Owners of these MOPAR EFI kits I've come across
> have raved about how well it performs, the Howell version too. Too bad
> they're so expensive, but they sure are a good retrofit item on the 258.
>
> Oh, also, FWIW, if you're ever going to consider 35's you should consider
> the RE 4.5" kit rather than the 2.5.
>
>

 

Richard Harris (SHARRIS11nospam@san.rr.com) wrote on Monday 26 April 2004
11:42 am:

> Thanks again for the welcome back. I'm having some problems with my MOPAR
> fuel injection on my 258. It runs great once it's warmed up but upon first
> start in the morning it runs like crap. (not sure how crap really runs but
> its the best familyish word I can come up with right now.)
> As long as I keep my foot in it its ok but if I just fire up the engine
> and don't use the skinny pedal, it sputters and dies at least once. I
> can't find any vacuum leaks. I checked by spraying WD on all connections
> including manifolds. I'm running 92 octane as recomended by MOPAR. The
> engine was rebuilt recently (before deployment) with basically all new
> guts. It's done this since the install/rebuild. Any takers on what could
> be the problem? Thanks in advance for the advice..
> Rich Harris
> 86CJ7: Mopar MPFI, Detroit locker, 31 BFG AT's(for now) 1" body lift, Got
> money left over from deployment and it's going into gears, a front locker,
> Rubicon Express 2-1/2" YJ springs, one piece axles, and 33" BFG MT's. LIFE
> IS GOOD!

I've got the same problem. Actually, mine sometimes even dies twice. I've
gone to Hesco a number of times with no luck. I've done everything they've
recommended, and replaced parts that might even remotely have something to
do with it. No luck.

If you fix it, please share with the rest of us.

Thanks.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891

 

Richard Harris (SHARRIS11nospam@san.rr.com) wrote on Monday 26 April 2004
11:42 am:

> Thanks again for the welcome back. I'm having some problems with my MOPAR
> fuel injection on my 258. It runs great once it's warmed up but upon first
> start in the morning it runs like crap. (not sure how crap really runs but
> its the best familyish word I can come up with right now.)
> As long as I keep my foot in it its ok but if I just fire up the engine
> and don't use the skinny pedal, it sputters and dies at least once. I
> can't find any vacuum leaks. I checked by spraying WD on all connections
> including manifolds. I'm running 92 octane as recomended by MOPAR. The
> engine was rebuilt recently (before deployment) with basically all new
> guts. It's done this since the install/rebuild. Any takers on what could
> be the problem? Thanks in advance for the advice..
> Rich Harris
> 86CJ7: Mopar MPFI, Detroit locker, 31 BFG AT's(for now) 1" body lift, Got
> money left over from deployment and it's going into gears, a front locker,
> Rubicon Express 2-1/2" YJ springs, one piece axles, and 33" BFG MT's. LIFE
> IS GOOD!

I've got the same problem. Actually, mine sometimes even dies twice. I've
gone to Hesco a number of times with no luck. I've done everything they've
recommended, and replaced parts that might even remotely have something to
do with it. No luck.

If you fix it, please share with the rest of us.

Thanks.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891

 

Richard Harris (SHARRIS11nospam@san.rr.com) wrote on Monday 26 April 2004
11:42 am:

> Thanks again for the welcome back. I'm having some problems with my MOPAR
> fuel injection on my 258. It runs great once it's warmed up but upon first
> start in the morning it runs like crap. (not sure how crap really runs but
> its the best familyish word I can come up with right now.)
> As long as I keep my foot in it its ok but if I just fire up the engine
> and don't use the skinny pedal, it sputters and dies at least once. I
> can't find any vacuum leaks. I checked by spraying WD on all connections
> including manifolds. I'm running 92 octane as recomended by MOPAR. The
> engine was rebuilt recently (before deployment) with basically all new
> guts. It's done this since the install/rebuild. Any takers on what could
> be the problem? Thanks in advance for the advice..
> Rich Harris
> 86CJ7: Mopar MPFI, Detroit locker, 31 BFG AT's(for now) 1" body lift, Got
> money left over from deployment and it's going into gears, a front locker,
> Rubicon Express 2-1/2" YJ springs, one piece axles, and 33" BFG MT's. LIFE
> IS GOOD!

I've got the same problem. Actually, mine sometimes even dies twice. I've
gone to Hesco a number of times with no luck. I've done everything they've
recommended, and replaced parts that might even remotely have something to
do with it. No luck.

If you fix it, please share with the rest of us.

Thanks.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891