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Old 01-27-2007, 09:37 PM   #1
redmaro
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Default Did a diagnostic.

Well the problem with the car is that its hard to start in the mornings and my Idle is like at 1500 to 2000, but sometimes it drops to normal working RPM's.

These are the codes I got:

Code 22

Code 25 (not sure)

Code 26

Code 52

I was thinking maybe code 22 maybe(water temp sensor signal) causing some of my problems, but im not sure.
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Old 01-28-2007, 12:01 AM   #2
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Is the idle that high most the time ,or just during warm up? That's still high even for warm-up ,just wondering.Unfortunately my book is hiding or I'd know what the codes meant...
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Old 01-28-2007, 12:49 AM   #3
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I think i found where the problem is. Just right now I moved my wiring from the air box sensor while the car was at high idle and the car just rapidly dropped the Rpm's at normal working conditions. Theres probably something wrong with one of the wires.
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Old 01-28-2007, 04:18 AM   #4
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Code 22- Coolant temperature sensor signal

Code 25- (1988 California models only) Air-fuel ratio lean condition

Code 26- (1988 California models only) Air-fuel ratio rich condition

Code 52- Knock sensor signal

I would check the coolant temperature sensor's resistance. Should be 4-6K ohms at 32 degrees F. The resistance should go down as the engine warms up. At 212 degrees F it should be .17-.22K ohms. So check it when its ice cold then check it when its fully warmed up. You will have to remove the PS reservoir to get to the sensor. If the resistance doesn't change or is not in the ranges I specified, the sensor is bad.

You're on your own with the lean AND rich conditions. I would bet, since you said your not sure about the code 25, that it was 26 repeating twice and you missed a flash. That would make sense since a bad coolant temperature sensor usually defaults to completely rich (i.e. 20k ohms never changes).

And for the last code, your knock sensor or knock sensor circuit is bad. The TSRM doesn't show you how to check the circuit so I can't help you there.
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Old 01-29-2007, 04:11 AM   #5
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Quote:
Originally Posted by redmaro
I think i found where the problem is. Just right now I moved my wiring from the air box sensor while the car was at high idle and the car just rapidly dropped the Rpm's at normal working conditions. Theres probably something wrong with one of the wires.
I've read this 'story' many times here. Check all the wires at the Air Flow Sensor connector and repair any that are loose or broken. Check the pins for corrosion, and clean as needed.

Then remove the EFI fuse for 10 minutes, in the fuse box next to the battery. This will clear all the codes.

Start the car and let it idle for about 10-15 minutes, then drive it for about 20-30 min., city/neighborhood, and a bit of hwy. This will allow the computer to 're-learn' the system.

Your problems may be gone now. If you are still having troubles, recheck for any codes, and follow the TSRM proceedures for each code pulled.
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Old 02-04-2007, 04:43 AM   #6
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Finally fixed my Idle problem. It was the cooling temp sensor connection, it was connected backwards probably from the mechanic who fixed my BHG.
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