Please help me out guys....Few days ago...I went to about 2 lbs and BAM my car went to lean and bogged very bad ....i tried to go under boost one more time to check and same thing it started to go to stoich and i let off ....well i thought i had a vaccum leak and my fpr wasnt working so i fixed it and as i was driving home today .....it was ok at first when it was cold ..then bam..drivingon the highway no boost in nuetrul goes straight to lean and ildes..stutters ....drops to about 100 ..raises up to 1200 ..stutters dies...i pull over ..wont start for more than 2 secs then dies ..i get it towed ..starts up 2 hours later..ildes for about 30 secs stutters ...drops revs and dies ...im running a 12:1 inline pump is working fine ...is my stock pump dead ??? please help!

 

???

 

sounds like your OE pump is bad, or potentially your having a hard time getting good spark under that sorts of compression. check your fuel filter, clean your injectors, upgrade your ignition. It could really be a number of things, but check those things first, sounds more fuel related rather than spark, but check it all. 12:1 compression + boost = kaboom.

I know that my hybrid with 11.5 to one has hard time getting it to go. she sputters sometimes too, she'll fire, just give it a day or so.


[Modified by 2k1_itr_0736, 2:24 AM 11/1/2002]

 

sounds like your OE pump is bad, or potentially your having a hard time getting good spark under that sorts of compression. check your fuel filter, clean your injectors, upgrade your ignition. It could really be a number of things, but check those things first, sounds more fuel related rather than spark, but check it all. 12:1 compression + boost = kaboom.

 

how the he;; did tha thappen

 

im sorry i meant 12:1 FMU not compression its an LS ...so you think fuel pump first ??? it will idle when cold for about 15 secs then sputters ...drops down to 100 for about 10 secs raises up to about 1000 then drops and shakes and dies..then wont start

 

ttt

 

anyone ?

 

sweet lord people ......come on ...its not rocket scince just give me your guess here pleasee

 

Ok here is my opinion...
Sounds like your fuel pump. do you have an Inline Fuel pump? Do you have any kinks in the vacuum sources for the FMU? it could be alot of things as mentioned above. sounds fuel problems. maybe get another fuel pump, switch them out, takes 30 mins. and see what happens. then go from there, but hopefully that will fix it.

-deepsi

 

what im thinkin to man ....I sure as hell hope so

 

let us know what happens. But, like they said, it could be anything. When installing things, there are soo many things you have to be able to go back and check. Vacume lines, fuel pressure etc. Do you have a fuel pressure guage on the FPR? Doesnt that tell you if the ammount of FP is resonable>? I would rather spend 30 bux on a Fuel Pressure guage to help diagnose the issue rather than spend an *** on a fuel pump if you dont need it. Good Luck

 

that is actually a go way to look at it. a fuel pressure guage will tell you a lot, instead of changing the fuel pump. i reccommend getting a fuel pressure gauge and see what the fuel is doing. Steve Berman

-deepsi

 

devin were u at????? have been tryin to get a hold of u for days!