Help! Can't figure out high idle.
#31
Senior Member
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CathedralCub (02-22-2024)
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CathedralCub (02-22-2024)
#33
Senior Member
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#34
Junior Member
Posts like a Ricer Type-R
Thread Starter
Update
Turns out, the PCM was bad. I replaced it and did the key re-learn. The car started right up and idled good. I took it for a drive and it drove much better. It'* still a little gutless but it never missfired when I pushed it hard. Under a heavy load there is still a loud hiss coming from the engine compartment too. I wonder if the exhaust is restricted. I am also getting 2 codes, P1651 PSP switch input malfunction and P1406 egr valve pintle position circuit.
Turns out, the PCM was bad. I replaced it and did the key re-learn. The car started right up and idled good. I took it for a drive and it drove much better. It'* still a little gutless but it never missfired when I pushed it hard. Under a heavy load there is still a loud hiss coming from the engine compartment too. I wonder if the exhaust is restricted. I am also getting 2 codes, P1651 PSP switch input malfunction and P1406 egr valve pintle position circuit.
The following 2 users liked this post by Bute56:
carfixer007 (04-08-2024),
CathedralCub (04-09-2024)
#35
Senior Member
True Car Nut
That P1651 could be the hiss.
#36
Senior Member
Update
Turns out, the PCM was bad. I replaced it and did the key re-learn. The car started right up and idled good. I took it for a drive and it drove much better. It'* still a little gutless but it never missfired when I pushed it hard. Under a heavy load there is still a loud hiss coming from the engine compartment too. I wonder if the exhaust is restricted. I am also getting 2 codes, P1651 PSP switch input malfunction and P1406 egr valve pintle position circuit.
Turns out, the PCM was bad. I replaced it and did the key re-learn. The car started right up and idled good. I took it for a drive and it drove much better. It'* still a little gutless but it never missfired when I pushed it hard. Under a heavy load there is still a loud hiss coming from the engine compartment too. I wonder if the exhaust is restricted. I am also getting 2 codes, P1651 PSP switch input malfunction and P1406 egr valve pintle position circuit.
The following users liked this post:
CathedralCub (04-10-2024)
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CathedralCub (04-10-2024)
#38
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CathedralCub (04-10-2024)
#39
Junior Member
Posts like a Ricer Type-R
Thread Starter
I can get a hold of a vacuum gauge. How do I go about testing with that?
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CathedralCub (04-10-2024)
#40
Senior Member
You watch it as you give it throttle to about 3500 rpm and hold it there. The vacuum should go high and stay there. If after a few seconds the vacuum starts dropping the exhaust is restricted.
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CathedralCub (04-10-2024)