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Old 09-09-2012, 06:24 PM   #1 (permalink)
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Default Code 41 advice needed...

I have been having a code 41 issue going on in my 91 R/T N/A. It has a rebuilt ecu and I even swapped it out w/another rebuilt 91 N/A ecu and still code 41. The cars runs fine when cold. When it warms up it goes crazy. Sounds sick as a dog!

I than changed out all 6 injectors with one of my other N/A cars and it's still throwing a 41 at me! All wiring seems to be fine and all plugged in.

And it also has been having a slight knock! WTF! It only has 60k on it!!! These N/A's kick my A$$ more than my TT's do!

Any ideas as to me overlooking anything?

-Dan
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TT's:
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94 SL w/5spd, Megan coliovers, K&N, Intake, wife's
91 ES For Sale...
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95 R/T w/5spd...currently being parted out


Inquire about parts...I have a lot to get rid of!!!
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Old 09-09-2012, 07:46 PM   #2 (permalink)
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Default Re: Code 41 advice needed...

Well, after some extensive research, trial and error, I have come to find it may be the ISC. I did swap that out and cleaned the one to be swapped. I just ordered a new one from Rock Auto and we shall see.

To Be Continued...
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Old 09-15-2012, 11:08 AM   #3 (permalink)
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Default Re: Code 41 advice needed...

Well, I will tell you I thinks these cars are the biggest POS sometimes!!! I have changed out the injectors, installed a brand new ISC, a rebuilt ECU x 2, and still get a code 41! All wiring is good...I am just sick and tired of this issue! I am about to lose my mind...
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Old 09-15-2012, 11:11 AM   #4 (permalink)
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Default Re: Code 41 advice needed...

what about swapping out the coil pack.
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Old 09-15-2012, 11:13 AM   #5 (permalink)
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Default Re: Code 41 advice needed...

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Originally Posted by 3krazygt View Post
what about swapping out the coil pack.
Well, I wouldn't think it would be that since it was changed out w/a new one 3k miles ago. I could check it out and see.
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Old 09-15-2012, 11:17 AM   #6 (permalink)
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Default Re: Code 41 advice needed...

It sounds like code 41 can be caused by a number of things failing. The problem I see is those things that fail "such as the ISC short circuiting" can also feed back and damage your ECU. So you could be fighting a circular problem. Bad component, Good Ecu = Bad component and now bad ecu and throws code 41. Bad ECU, and good Component = still bad ECU and good component which still equals code 41...

Just a thought to consider as a worst case scenario.
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Old 09-15-2012, 11:19 AM   #7 (permalink)
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Default Re: Code 41 advice needed...

Quote:
Originally Posted by 3krazygt View Post
It sounds like code 41 can be caused by a number of things failing. The problem I see is those things that fail "such as the ISC short circuiting" can also feed back and damage your ECU. So you could fighting a circular problem. Bad component, Good Ecu = Bad component and now bad ecu and throws code 41. Bad ECU, and good Component = still bad ECU and good component which still equals code 41...

Just a thought to consider as a worst case scenario.
Yeah lol I could be chasing my tail on this one! I will check the ecu(s) out on my other 91...

Last edited by daneboy5; 09-15-2012 at 11:28 AM.
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Old 10-11-2012, 06:05 PM   #8 (permalink)
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Default Re: Code 41 advice needed...

Well, I am still chasing my tail on this POS! I fuckin hate these cars sometimes! I just got the ECU's in today. They had some issues, and they were corrected. Now, I install the ECU and start it up...instantly runs like SHIT! Throws another code 41 in my face and I am about to throw in the towel! How much more can I do on this? I mean holy fuck!!! New ISC, swapped injectors/harness, swapped coil pack, ECU rebuilt (twice).

Am I missing something here? Good ECU + new parts/known good parts should = running car!!!

I need to get this car up and running so the wife and daughter leave me the hell alone about it! lol
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Old 10-11-2012, 07:42 PM   #9 (permalink)
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Default Re: Code 41 advice needed...

So, I change out the original (rebuilt ECU) with another rebuilt ECU and the car runs fine. It however throws another code 41 but doesn't stumble all over itself now.

I may have some more issues w/the original ECU AND something else to throw the code 41 still. I clear the codes by disconnecting the battery and the code 41 comes back after 5 secs from starting...
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Old 10-11-2012, 07:59 PM   #10 (permalink)
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Default Re: Code 41 advice needed...

It sounds like it's the PTU.
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