Non-370Z - Technical Quesetions

davidyan

So I have a 2000 Toyota Celica GT-S that I never traded in when buying the Z. I'm trying to sell myself and yesterday a guy interested in buying it took it to his mechanic friend. I let him test drive the car. He mentioned that after redlining the car, the return Idle speed was a tad high. It settled at about 900 RPM immediately afterwards (about 100 RPM over average). He mentioned that the return idle speed after redlining is a good way to test the engine and that if its a little high immediately after, something could be clogged.

Question 1:
Anyone know whether his clogged passageway explanation makes sense? He made it sound like sludge clogging some oil passageways, which I don't think is accurate but wanted to run it by others. I suspect it could be due to either:

1. the sensors adjusting slowly when the RPM cycles down so quickly - from about 8000 RPM back to idle or,

2. that the throttle doesn't back off quickly enough to 100% closed. It could be that when the car was being floored just a 1/2 second ago, there is tons of air/fuel being pushed through and that even after immediately backing off, there is some remaining air/fuel (more than the average for idle) finishing its way through the combustion chamber. This to me would be plausible for the 100 RPM higher idle immediately after.

Question 2:

Also, some of the Celica's with the GTS (2ZZGE) motor have loud fuel injectors. Mine is one of them and was like this since the car was brand new with less than 5 miles on it. I have had it inspected by the dealer, an independent mechanic, and also tested it myself confirming its the injectors being loud but operating completely normally. A good number of GTS owners also experience this but not all- there is no difference in dyno results, driveability, etc from those of us with the loud injectors vs. "normal". The problem is that upon first hearing it, it sounds like a valve problem which even the most experienced mechanics point out at first until they investigate deeper. This is making it difficult to sell my car. Does anyone know any explanations for why mine might be louder? Keep in mind those of us with loud injectors had it from day 1, not after owning the car for some time. Also, any ideas for how to explain it to a potential buyer? I had the documentation before from the dealer explaining it was normal but can no longer find it.

Kind of random, but thought some of you may have a good explanation.

thanks

fullmonty

If the dealer looked at it \, you should be able to go back to that dealer and have them print out a report that has all the maintence done on the car by them