Stuttering under heavy load...

[1gpwnge]

this is a long one but please help me out...

i took my car into the shop because it was studdering when the boost would climb... they did a compression check and found that i had only 90psi... so they said that it was the topend...i had it rebuilt and ported and polished.. they put it all back together and, same thing... so then they did another compression check and it was still 90 they coated the cylinders with some kind of oil and checked it again...190... they insisted that the reason it was reading 90 is because they left it outside..and left the block exposed for a week... (i dont believe it, sounds like they misdiagnosed my car and my rings are gone) after the compression went back up to 190 the studdering stopped for the most part, then it would start losing power at fullboost.... now for some reason its only boosting 7psi and studdering at that... randomly backfiring sometimes... im just so lost someone help me . and if the rings are shot why would my boost be 14 and then all the sudden only be able to hit 7...AHHH

help would be appreciated
thanks guys

 

[dsmtalontsi95]

It sounds like you took it to a bad shop. It was deffenatly your rings to begin with and now it sounds like they didn't time your car correctly when it was put back together. Take it back, tell them you want the bottom end fixed or money back for the head, also tell them to time your car the right way. Or just ask for your money back and have someone else do it, sounds like they don't know how to diagnose a car.

 

[laserspeeddemon]

Your username is very fitting for this situation. They misdiagnoised your car to begin within, then performed the wrong work. And then performed the test they should have done in the first place. BUT becauce the actually did the work they promised (rebuilding the head), they are going to keep your money. If you want your money back, hire a good lawyer. Doing a compression dry, then wet is an industry standard. Doing only one of these tests is either a bad mechanic or one that is trying to rip you off. Either way, the result is the same; work that didn't need be done, a high bill that didn't fix anything and another estimate to do more work.

Here's the kicker. They openly admitted that they left the car in the elements and then use that as an explaination as the cause for the low compression. So they are admitting that they caused the damage, by not taking proper measures to prevent the damage that leaving it in the elements for a week would cause. If you can convince them to write a new estimate with that as the cause on the estimate. Then you will have STRONG grounds for a law suit and you won't even need to hire a lawyer. Just talk to your local Legal Clerk and find out what you need to file for a civil case to be seen before a judge. You can likely get ALL you money back plus some since in my opinion this is malcious and is in intent to steal your money by purposely omitting prodecures to diagnose and/or repair the car.

Either way, get your car back after you get them to give you the damning evidence. Have it towed, they can not legally keep the car and get fixed elsewhere. Or find a knowledgeble DSMer (like me) in your area to help you.

If you want a quick fix, find a working 91 turbo motor drop it in and go. The proper way to do it is to have it professionally rebuilt.

Good Luck.

 

[1gpwnge]

well i took the car back in to them and they got the boost situation under controll and the compression is staying within the good range so....basically it runs great...until the boost peaks, then it studders...sometimes under a heavy load it studders to...

 

[dsmmatt28]

First off to have 190 compression on a stock 6 bolt i dont think is right it sould be like 155 to 160 all the way across. To get that high of compression you would need higher comprssion pistions and since its stock. That should have been your first clue that they were full of ####. Make sure you have ngk br7es spark plugs first of all. You might need a new coil pack . Check that first and then let us know. ALways start with the simple things first. Make sure your transitor is pluged in good. The little clip wears out and sometime may come lose after 17 years .

 

[Defiant]

STUTTERS.

"Studders" is not a word, if you're over ten. ​

 

[xtreme-elements]

dsmmatt28 is right, "First off to have 190 compression on a stock 6 bolt i dont think is right it sould be like 155 to 160 all the way across. To get that high of compression you would need higher comprssion pistions and since its stock. "

first thing is that if the shop says they left the car outside and uncovered with the head off then they are liable for the damage.. any reputable shop would know better..

also if you have only 90 psi compression then either the valves are bent or the piston rings are shot. since the head was redone, i would definatly try to get them for mis-diagnostics and go with the rings