So I went driving the Camaro around today (2nd time this month ) and by the end of the ride it wouldnt idle on it's own, I'd have to keep my foot on the gas ( I got good at braking with my left so I could keep the car running for power brakes lol).

I also got these codes

24, 41, and 53.

24 is from the VSS, and I should check the TPS setting. So I guess I'll do that.

41 I couldnt find any information on... which makes me afraid it might be an ECM problem.

53 is an alternator voltage problem, which could also be another reason it doesnt idle on it's own, but who knows?



I am going to take out the Bosch Platinum +4's and put in some good 'ol AC Delcos, which I THINK should solve my idle problems, but figured I'd state the biggest problem i've found with the car so far.


Thanks in advanced if you can shed any light on any of this... espescially code 41.

 

41 is tach input error. Typically set when you disconnect the distributor to set the base timing.

Not sure what they have in common, unless it was a connector that wasn't quite tight. The high voltage may be lack of load, the other two from open circuit (well, all three due to open circuit).

 

The VSS signal to ECM comes via the Speedometer, this signal get converted to MPH, and is used to, among other things, tell when the car is moving, so that it can control power off loading, like when you stop abruptly, it won't stall.

On my '88 TPI

I've never had the ECM set a code when I disconnect the set timing connector.
My manual says a code 41 is faulty connection to Memcal, or faulty ECM

If you've disconnected the EST module maybe it will.

 

Ah, but he has computer controlled carb.

The Code 41 was my weekend nemesis. I set the timing Friday, later in the day the SES light came on and the only code I could retrieve was the 41 from setting the timing. I unplugged the ECM power to clear the codes, ran it again, got the SES again, and finally discovered the real code being set was the vacuum sensor - the manifold vacuum sensor line was melted by the fried radiator fan wire (from the fan motor shorting out), which is what set off the original SES light.

Anyway, long story to say that yes, on a CC carb system, you will set a Code 41 when you set the timing.

 

Good stuff to know. Glad 41 is normal.

Would the code 53 be set if it stayed in open loop for too long?

I have the thermostat out, and I am in the middle of swapping to 4th gen dash, so I pulled the air conditioning (I dont have A/C, but the heater controls and stuff) so the heater box seems to seep out heat the faster I go.... all in all, I'm sure the car never actually gets into closed loop... my coolant temperature gauge doesnt work... it's a wiring problem or something... (and that's the speil of why I stay in open loop lol)


Thanks for the info!

 

According to the GM trouble code PDF, 53 could either be system overcharge or an EGR issue (for carbureted cars, which yours would be).

Test your charging system to see which it is. Work from there.

 

Thanks Stekster, I'll go to work and use the tester there You're online as frequently as I am now days

 

You are welcome....Sellmaniester?