WAAAAAYYYYYY to much fuel.....

[V7X]

Hello,

I just bought a 92 laser awd and I'm having some trouble. I can't get the motor to rev past 3,000 rpm. If I try it bogs and spits raw black fuel out of the tail pipe(got all over my buddies face.) Since I have bought the car(it was stock) I have replaced the plugs and wires with ngk parts and compression tested the motor. It was rebuilt by a reputable shop 15,000 mile before I bought it. All the plugs are making spark. I have plans to replace the injectors with another pair of stockers and swap the coil with a buddies.

Is this logical? Or am I not even looking at the area "ignition"?

Thanks for any suggestions.

 

[willsdsm]

I'd have the o2 sensor checked, and maybe the fuel pressure reg.

 

[DSM90AWD]

Few things to check:

1.) Did you check for intake leaks btw MAS and throttle body?
2.) Is the fuel filter of known condition?
3.) Base ignition timing s/b 5* BTDC
4.) T-belt alignment check - with the crank pulley's ignition pointer centered on TDC on the scale make sure your cam sprocket pointers are at 3 oclock (Exhaust) and 9 oclock (Intake).

....If I try it bogs and spits raw black fuel out of the tail pipe(got all over my buddies face.)

umm..

 

[BOOSTING_GST]

Is your check engine light on. Is your MAF sensor pluged in. I had a simular problem and it was the MAF sensor.

 

[V7X]

Okay,

There is no check engine light. I am also going to pressure test the intake tomorrow. I checked the timing and it was correct 3 O'Clock and 9 O'Clock as you said. I have no idea what the fuel filter looks like and I have no idea about the o2 sensor but I'll check that too. Also I forgot to mention all the cylinders are running rich, but the number 4 one is running so rich that when I pulled the plugs it was wet with unburnt fuel. Didn't know if that would tell you anything or not.....

Thanks again

 

[Bostedquest]

Okay,

There is no check engine light. I am also going to pressure test the intake tomorrow. I checked the timing and it was correct 3 O'Clock and 9 O'Clock as you said. I have no idea what the fuel filter looks like and I have no idea about the o2 sensor but I'll check that too. Also I forgot to mention all the cylinders are rumming rich, but the number 4 one is running so rich that when I pulled the plugs it was wet with unburnt fuel. Didn't know if that would tell you anything or not.....

Thanks again

welcome to my nightmare...

 

[92awddsm]

Okay,

There is no check engine light. I am also going to pressure test the intake tomorrow. I checked the timing and it was correct 3 O'Clock and 9 O'Clock as you said. I have no idea what the fuel filter looks like and I have no idea about the o2 sensor but I'll check that too. Also I forgot to mention all the cylinders are rumming rich, but the number 4 one is running so rich that when I pulled the plugs it was wet with unburnt fuel. Didn't know if that would tell you anything or not.....

Thanks again

The 2 #1 causes of what you are seeing on your 1g=
1- boost leak. This can be determined by performing a boost leak test. http://www.vfaq.com/mods/ICtester.html

2- Leaking capacitors and/or ecu damage. Pull the ecu, open it up and see what the inside looks like. If the capacitors have been leaking for a while, the acid will eat up the copper traces and cause all kinds or problems. http://www.tmo.com/howto/ecu1g/caps.htm

If the ecu is damaged, I suggest you contact steve or visit his website for repair.

 

[Toddy]

i agree with 92awddsm. i had this problem not to long ago bro. i replaced every sensor possible and it turned out to be the computer and intercooler. the intercooler was all town up and was leaking boost. hence why it wont rev parts 3k. mine did the same thing. the computer was causing it to run rich. mine wouldnt throw a chekc engine light most of the time.

make sure all your hoses are clamped tight through out the intercooler piping and pull your ecu out. i believe its behind your cd player. unscrew the cap and look to see if it shows signs of corrosion or smells burnt.

 

[V7X]

Well, believe it or not I replaced the injectors and the fpr with no change at all........And then we decided to swap in a spare coil.........rev ed all the way to 6 grand with out even a sputter.....!!!!!!!!

Thanks for all your help.

 

[V7X]

I thought it was fixed but no, it runs good for a sort time but as soon as the car warmer up it starts al over agian. soooooo pressure test and ecu check on tuesday until then....Happy 4th and pass me another cold one......

 

[marcmsj]

have you checked your maf and your ecu as advised?

and yes, do the intake leak test..

 

[V7X]

I did check the MAf, but I didn't really see anything physically wrong with it. It did however have some dirt on the maf....caked on I just cleaned it off. SO yes that may be bad I guess. Haven't checked the ecu, but will on tuesday....Maybe today if I get bored enough.

Will reply soon.

Thanks a lot.

 

[marcmsj]

hrm.. you shouldn't have any dirt on your maf... unless you were running it without an air filter which would be bad..

if you had dirt "caked" on your maf, it would give me reason to suspect that it's not running the way it should be. if you have acess to a working spare maf, i would swap it out and try that as well.

 

[V7X]

It was like that when i bought it. I don't have a spare maf.... At least not a spare 1g maf.....I was worried about that.....(the dirt in the maf).....so it's MAF......intake pressure.....and ecu......grrrrrr

 

[marcmsj]

It was like that when i bought it. I don't have a spare maf.... At least not a spare 1g maf.....I was worried about that.....(the dirt in the maf).....so it's MAF......intake pressure.....and ecu......grrrrrr

i doubt your problem is an intake leak unless it's something massive like your upper intercooler pipe coming off but i'm sure you would have noticed that.

if you've checked and double checked your maf wire harness then what i would do is try to get another maf for testing purposes. you could probably get a cheap one at a local junkyard or look for one in the classified section. yes it would suck if you got another one and the problem turned out to be something else, so make sure you've checked and rechecked your connection first. unplug your maf connector and plug it back in and make sure it snaps back in place. also try retightening all your intercooler coupling clamps.

 

[V7X]

Yeah at this point I think that that is what I'll do......Have to wait till I get paid and then head up to the Junkyard. The only other thing I think I really need to do is check the ECM.

Thanks Agian

 

[V7X]

K first off. I think I was slightly mis-leading in one of my earlier posts. I said that there was dirt caked on the MAF. This informance was incorrect. There dirt caked under the MAF on the canister attached to it.

And as it turns out. My ECU is now fried I tried to start it and it wouldn't start. CHecked everythig once and then agian. Tried to start it a couple more times with no luck. Then I tried to jump start it with no luck. TRied one more time and then there it was smoke from under the dash and a NASTY smell. Oh well hopefully replacing this will fix the other problems as well.

Hope it can be rebuilt if not junkyard here I come.!!!!!!!

 

[V7X]

Just so there is closure on this subject it was the ecu......

Thanks agian for everyones help.

Ryan