Turbo/Idle issues... cant figure it out
ok i still havnt figured out what my issue is with my 98 spyder gst. i have a stang idle issue that i cannot seem to fix. I have tried the IAC 4 times and nothing has seemed to make a difference. so today i went threw and pulled all the code/car info from the OBDII connection. the CEL was not on but i was still able to pull the codes. this is what i got:
@ engine idle i have a load at 30% CEL- P0505= Idle air control system. (i have 4 different sensors and not 1 has fixed this issue) car goes back and fourth between open and closed loop at any temp short term fuel trim switches between 0%-24.2% long term fuel is at 12.5% spark advacne is around 16* air flow from mass air flow sensor to turbo 1.265 @ 1500 rpm oxygen sensor: Bank 1 0.02 volts, Bank 2 0.02 volts this is what i have gotten of of my OBDII engine reader from craftsman. the car has trouble creating boost at low RPM's and the only time i can get a good blow-off is after 5,00rpms. which to me isnt normal but i may be wrong. anybody know what might cause this issue? things i have replaced within last 6 months( car hasnt run properly for over a year): O2 sensor #1 on turbo IAC (4 times- no difference) TPS All this started after i had my headgasket replaced. i also replaced all of my timing belts, water pump BS belt, and all new gaskets. There is some whine that i cannot figure out. someone once mentioned that it sounded like it came from the turbo. but they were not 100% nor were they a mechanic. thanks for any help |
check your coolant temp sensor
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what do you mean coolent temp sensor? the highest it got that i can remember was 206* and that was before we shut it off. I do know that my collent level is low and thats one thing that i havnt taken the time to get yet so thats probly y its a little high. would this cause a high idle?
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i mean the coolant temperature sensor (CTS), it senses the temperature of your coolant. the low coolant is definitely the reason for the temp getting that high, as for a high idle, its possible, fill it up, bleed out the system, and see if that fixes it, if not my bet is on the cts
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anybody else got any other ideas. im gonna fill up the coolent today and see what it does. but i dont think thats the issue
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maybe some vacuum lines werent hooked back up correctly after then put the head back on
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Originally Posted by 98gstspy
(Post 242914)
car goes back and fourth between open and closed loop at any temp
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ok, im about 99.9% sure that all the vacuum lines went back the right way. i have checked that many times because i thought that was the issue. couldnt find a single one that was out of place.
i dont think that a vacuum line would cause the engine to work so hard at idle like it is. its also got a very rich fuel mixture that i cannot figure out y. |
Originally Posted by 98gstspy
(Post 242955)
ok, im about 99.9% sure that all the vacuum lines went back the right way. i have checked that many times because i thought that was the issue. couldnt find a single one that was out of place.
i dont think that a vacuum line would cause the engine to work so hard at idle like it is. its also got a very rich fuel mixture that i cannot figure out y. |
ok im gonna pick one up today if not i will have it ordered today nad i will let you know on my progress
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