Code 41

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Jan 26, 2012 | 11:55 PM

racerseks

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Burning Brakes

Joined: Apr 2007

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Code 41

Hey guys...

I recently cured my "no start" issues with a new fuel pump, new MAF and new MAF Power and Burnoff relays. The car ran and drove fine for a few days, but now I'm back to not getting it to start. I get a code 41 with my code scanner..."Electronic Spark Control Timing Error". Any ideas on how to get me back on the road again?

Thanks...

Jan 27, 2012 | 08:23 AM

AGENT 86

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From: Summerland B.C. Canada

FSM says it could be an ECM ground problem. You may want to look at the ECM's grounds at block, just above oil filter. Be sure that the connections are clean and tight.

http://members.shaw.ca/corvette86/Code%2041.pdf

Jan 27, 2012 | 05:47 PM

racerseks

Thread Starter

Burning Brakes

Joined: Apr 2007

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Quote:

Originally Posted by AGENT 86

Hi Agent86!

Thanks for the link! Would you by any chance have a pic of that, or know where I might find one? Is it something I can access from above/on top? Any kind of multimeter tests I should do?

Thanks for your reply!

Jan 27, 2012 | 09:39 PM

AGENT 86

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From: Summerland B.C. Canada

I would imagine it would be easier from below.
You could follow the flow chart and check for ground at ECM connector.

Jan 27, 2012 | 10:36 PM

racerseks

Thread Starter

Burning Brakes

Joined: Apr 2007

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[QUOTE=AGENT 86;1579853888]

I would imagine it would be easier from below.
You could follow the flow chart and check for ground at ECM connector.

Hi Agent86...

Is this the ground I should be looking for? I can see how it will probably be easier to get to from underneath.

Do I just clean it and check it for good contact? Anything I need to check with a meter while I am down there?

Know where I could view the "flow chart"? Also, can you tell me where I might find the ECM connector you mentioned?

Thanks for the reply!

Jan 27, 2012 | 11:25 PM

526hp89

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Joined: Aug 2010

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From: Oakley, ca

code 41

I was getting a code 41 last year turned out to be a broken wire inside the the outer jacket right after the est connector. I couldnt see it but after probing it I found out where it was

Jan 27, 2012 | 11:41 PM

racerseks

Thread Starter

Burning Brakes

Joined: Apr 2007

Posts: 1,003

Likes: 13

Quote:

Originally Posted by 526hp89

I was getting a code 41 last year turned out to be a broken wire inside the the outer jacket right after the est connector. I couldnt see it but after probing it I found out where it was

Hi...

Can you tell me where the EST connector is?

Thanks for your reply!

Jan 28, 2012 | 02:26 PM

3D-Aircrew

Melting Slicks

Joined: Nov 2007

Posts: 2,830

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From: Gainesville FL

Quote:

Originally Posted by racerseks

You didn't say what year your car is but this happend to my '86 which turned out to a malfunctioning PROM:

Code 41 = Cylinder Select Error Circuit (1985-1991)

http://forums.corvetteforum.com/c4-t...t-86-vert.html

Last edited by 3D-Aircrew; Jan 28, 2012 at 02:33 PM. Reason: added info

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Jan 28, 2012 | 03:29 PM

AGENT 86

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Joined: Jan 2003

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From: Summerland B.C. Canada

[QUOTE=racerseks;1579854318]

Quote:

Originally Posted by AGENT 86

I would imagine it would be easier from below.
You could follow the flow chart and check for ground at ECM connector.

Yes, that is the main ground with all the ECM's grounds. You could clean each terminal and reinstall.
The flow chart is the diagnostic chart included in the code 41 link, that I gave you in my first post.

Jan 28, 2012 | 06:51 PM

#10

racerseks

Thread Starter

Burning Brakes

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Quote:

Originally Posted by rharker

Hi...

My car is an '86 as well. Thanks very much for posting that. I'll read through it...

Jan 28, 2012 | 06:53 PM

#11

racerseks

Thread Starter

Burning Brakes

Joined: Apr 2007

Posts: 1,003

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[QUOTE=AGENT 86;1579858732]

Quote:

Originally Posted by racerseks

Thanks Agent86...

I gotcha...I'll read through that again.

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