car starts but dies when given gas

[pezlow]

ok i looked at the other topics but no help ### not the same... sorry. first i have a 1991 eagle talon tsi awd that i bought for 1500 and it has a few mods but im not sure on all of them. well the problem is that the car starts and idles alittle but if you give it gas and try to drive it dies. it started when the guy i bought it from let some idiot over boost it and when he did that it popped off one of the intercooler pipes and died on them well they towed it home and after that the problem started. the guy checked the compression and he said that was fine he checked the valve sprigs there ok he checked to make sure the intercooler pipes were all on and tightened. he thinks that it might be that an injector came out but i dont think that could be possible ### the car wouldnt start and you could see the gas fly everywhere. im not sure what it could be. ### help. thanks

 

[93_tsi_fwd]

I didnt read pg 2 and 3, but do you have gas?

 

[pezlow]

heheh yes someone else mentioned that too and at first we didnt but when we put more in it didnt help we still had the same problem.

 

[Bender]

If you run out of gas or have the fuel line off for too long the contaminants that the filter caught can dry on it. I know you checked it, but did you change it?

 

[pezlow]

no i didnt change it. should i have even though it wasnt clogged?

 

[rush2252]

If you run out of gas or have the fuel line off for too long the contaminants that the filter caught can dry on it. I know you checked it, but did you change it?

Look at the jumper harness in the pic that was ghetto rigged into the MPI its obvious that soembody bypassed it at one point in time. Also note that he had only 2v on the 12V+ pin of the MPI connector. Im assuming the battery was charged then because you said you were turning the car over right before


Kolby

EDIT** dont the 1g NT cars use the same wiring and MPI relay??

 

[Bender]

Changing it definitely wouldn't hurt, plus its one more thing you can cross off the list.

 

[talones94]

my car did this exact same thing turned out i checked everything replaced maf same thing replaced everythin sensor wise on the car and all relays it was the fuel pump so i replaced the pump and on the road i am thats all it was so be sure to check tht i had that problem

 

[pezlow]

ok well took out the ECU again just to check if the short in the relay did any damage to the board and well at first it didnt look like it but then i turned it around and there is a lot of corrosion or actually it looks like rust cant get any good pix ### cam sucks. still need the wiring harness. havent checked starter yet been busy and how would i check the feul pump?

 

[Bender]

Oh.. that reminds me. My dad's 92 awd talon wouldn't run /idle right. We changed out the ecu and it worked perfect after that. .

 

[pezlow]

well i know thats a bad thing for the computer to have what looks like rust but can it be cleaned off ### nothing on the board is damaged. well where can i get a cheap ECU if thats the problem. and would that cause the short in wire to begin with?

 

[Bender]

Idk about that causing the short, but I would just try to borrow one locally. In case if that isn't the problem, you're not out of any money. I'm not positive, but I'm pretty sure 91-94 are interchangeable as long as the are both for awd, and the right transmission (either auto or manual).

 

[pezlow]

ok i was looking at ECUs on ebay and i was woundering what the difference was between MD#s. mine is MD166262 im not sure if its epron or whatever that means. but to the point i saw some with the #MD 166261 for 1991 awd 5speeds like mine does it make a dif. should i go with my # or can i use other #s as long as its for awd 5speed turbos? and what does epron mean? good or bad? how can you tell if you have epron?

 

[Bender]

Eprom means you can have it socketed and get a chip burned for it.. or more importantly, you can use ECMTuning, Inc. in the future. This is one of the best engine management systems for these cars. If I was buying a new ecu, i'd get eprom.. You can save money by not buying an eprom though, just to see if in fact, it is ## ecu that is bad. Uhm, theres a site somewhere that says all the different ecus and what they are for.. I'll look for it. But I would def, look for one for an automatic transmission. The ecu has nothing to do with the transmission, but one of the pins in the 90-99 is different. That is why we cant use an aem ems as a plug and play unit without changing this wire.

 

[pezlow]

ok well my step dad has checked all the diode ends for conductivity and he said everything checks outs ( hes a computer person) but my thing is even if it has conductivity could it still be bad?

 

[Bender]

Most of the time the capacitors go bad in these ecus. There's two of them, and they r right in the middle of the board. Have him check those, or see if there are any signs they are leaking

 

[pezlow]

ok well i have this pic of my ECU its not a close up so you cant see the corrosion or anything but the reason i took it is because i think its eprom ### ive looked at some non eprom and my looks alittle different but im not sure (circle part in pic) and yes my MD# is 166262 is that a bad thing and why?

 

[pezlow]

and as for the capacitors ive looked at them ### i had heard about them going bad and there doesnt seem to be anything wrong with them that i can tell.

 

[Bender]

The picture above is of an eprom ecu. You can tell by the eprom chip in the upper left hand corner. Also, there will be an E on the sticker on the case that says the model number.

Also, have you tried reading your data trouble codes?

 

[rush2252]

I would send that one in and have it repaired. Theres a guy named "steve" on here who repairs em and has quick turn around. As for the earlier post the autos and manuals use the same ECU in the 2gs for sure they have a seperate ECM for the tranny I think the 1gs do as well. Im pretty positive on that. If you ever do a swap you just unplug the tranny ECM and it should still run right.

Pezlow thanks for that file! I just realized I can get the cable for $80.00 and have all the datalogging capabilities I need! Also did you read my post about the NT cars? I think they use the same MPI and harness on the 1gs. It has to be the 2.0 though. I know the pumps are different but I think that connector is still the same.


Kolby

 

[Bender]

Oh, I just remembered also that I parted out a 90 4g63 n/t and kept most of the electrical. I have the full wiring harness and everything. Post up pictures of what you need, and I'll look for them this weekend when I go back to my shop.

 

[Bender]

OR if I cant find it... eclipse mfi, eBay Motors items on eBay.com

 

[pezlow]

well sorry for not being on for a couple of days been really busy. well ill get the pictures of the wiring harness and and as for the that post about the 90 n\t well i couldn't find it but thats ok.