88 GTU, help me, i dont know what else to fix
04-28-04, 02:33 AM
#1
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88 GTU, help me, i dont know what else to fix
ok, as most of you know i swapped in an engine, and all this started awilw after that. maybe like 5-6 weeks ago.
ok, after i installed my engine i ran wiht it for about a week and then i swaped in a stock exhaust up to the end of the Y pipe (so everything but the mufflers) i ran wiht that for a while, but it was still too loud and it had a really bad exhaust leak into the car. so after about 3 weeks of that i went to my local muffler shop to get a stock bit put on.
i asked him to put on a 2.5" piping from the cat back wiht a stockish muffler. he did just that. and my car was hella quiet, which i do like to an extent. well abotu 30 min. later after i made a few hard runs at my home town mountains i came to a stop light and the car dies. so i think, hmm that is weird. start it back up and drive on. at the next stop sign it does the same thing. hmmm... but i dont think much of it. thinking that my car is getting used to backpressure.
i go for a week with this set up and then i get an exhaust leak, one from the 2nd precat to the cat. so i go back to the same place, and get it fixed. now no more exhaust leak but still the dieing at stops.
the next weekend i diagnos the problem wiht my firend and we figure it is a vacuum problem. so then we replace all of the lines. but that doesnt fix it. so we think that it could be the gasket between the block and the lower intake manafold, as well as the lower intake manafold and the upper intake manafold. so we put some gaskets on those. but still nothing it didnt fix the problem.
next weekend rolls around and we are listening to everything. this is what we hear and have been hearing the whole time
"A hissing sound that seems to be coming from the top of the engine, like around the upper intake manafold pipes"
so we think it ay be the throttle body
tonight, we take some sealant and sealed the throttle body to the plastic thingy, and the plastic thingy to the upper intake manafold. and once again it didnt fix it. i dont know what the hell it is and i am frikken angry...
this bad thing happened right after i got the car back, is there a sensor that the shop might have ****ed up or disconnected that would make things go awray? could the o2 sensor be that ****ed up, but i dont think the o2 sensor would effect idle so bad
when i am accelorating or putting a load on the engine, the car is fine. it does everythign great it just doesnt idle.
please help, i have dropped a grip of money into this car and i dont want this to be happening
ok, after i installed my engine i ran wiht it for about a week and then i swaped in a stock exhaust up to the end of the Y pipe (so everything but the mufflers) i ran wiht that for a while, but it was still too loud and it had a really bad exhaust leak into the car. so after about 3 weeks of that i went to my local muffler shop to get a stock bit put on.
i asked him to put on a 2.5" piping from the cat back wiht a stockish muffler. he did just that. and my car was hella quiet, which i do like to an extent. well abotu 30 min. later after i made a few hard runs at my home town mountains i came to a stop light and the car dies. so i think, hmm that is weird. start it back up and drive on. at the next stop sign it does the same thing. hmmm... but i dont think much of it. thinking that my car is getting used to backpressure.
i go for a week with this set up and then i get an exhaust leak, one from the 2nd precat to the cat. so i go back to the same place, and get it fixed. now no more exhaust leak but still the dieing at stops.
the next weekend i diagnos the problem wiht my firend and we figure it is a vacuum problem. so then we replace all of the lines. but that doesnt fix it. so we think that it could be the gasket between the block and the lower intake manafold, as well as the lower intake manafold and the upper intake manafold. so we put some gaskets on those. but still nothing it didnt fix the problem.
next weekend rolls around and we are listening to everything. this is what we hear and have been hearing the whole time
"A hissing sound that seems to be coming from the top of the engine, like around the upper intake manafold pipes"
so we think it ay be the throttle body
tonight, we take some sealant and sealed the throttle body to the plastic thingy, and the plastic thingy to the upper intake manafold. and once again it didnt fix it. i dont know what the hell it is and i am frikken angry...
this bad thing happened right after i got the car back, is there a sensor that the shop might have ****ed up or disconnected that would make things go awray? could the o2 sensor be that ****ed up, but i dont think the o2 sensor would effect idle so bad
when i am accelorating or putting a load on the engine, the car is fine. it does everythign great it just doesnt idle.
please help, i have dropped a grip of money into this car and i dont want this to be happening
04-28-04, 02:54 AM
#2
Well lets see..
If you suspect a vac leak, the best way to find those is to spray carb cleaner around suspect areas while the car is idling.. If you happen to spray it on a leak, it will remedy the lean condition and change your idle (course most vac leaks tend to cause high idle).
What I would do if a sensor is suspect, is go ahead and pull codes.. Here is a link:
http://www.teamfc3s.org/info/article...odes/main.html
If everything checks out, maybe its time to readjust your idle...
Rat
If you suspect a vac leak, the best way to find those is to spray carb cleaner around suspect areas while the car is idling.. If you happen to spray it on a leak, it will remedy the lean condition and change your idle (course most vac leaks tend to cause high idle).
What I would do if a sensor is suspect, is go ahead and pull codes.. Here is a link:
http://www.teamfc3s.org/info/article...odes/main.html
If everything checks out, maybe its time to readjust your idle...
Rat
04-28-04, 09:15 AM
#4
Pressure test your intake if you think its a vaumn leak...pvc end cap, drill hole, insert valve stem, pump some air in....listen. A little leak is alright but if it doesnt hold air for a while something is wrong.
If thats not it I agree with j-rat. You just need to read ajust you idle. Turn that 10mm screw on the front fo your throttle body in/down just a little. It should raise your idle and make it more steady. Make sure the car is fully warmed if you do this.
-Ryan
If thats not it I agree with j-rat. You just need to read ajust you idle. Turn that 10mm screw on the front fo your throttle body in/down just a little. It should raise your idle and make it more steady. Make sure the car is fully warmed if you do this.
-Ryan
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04-29-04, 02:20 PM
#9
Pressure test your intake if you think its a vaumn leak...pvc end cap, drill hole, insert valve stem, pump some air in....listen. A little leak is alright but if it doesnt hold air for a while something is wrong.
Do you understand?????? You need to to get off the internet and open your hood....
Do you understand?????? You need to to get off the internet and open your hood....
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