Code 42 problem
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From: Woodland Ca
Code 42 problem
Has anyone experienced an code 42? What did it turn out to be?
My manual says that it could be an ignition modual. Are these pretty easy to change out?
Can this(the ignition modual) cause the engine to run rough?
Is there something else that I should look for?
Thanks
My manual says that it could be an ignition modual. Are these pretty easy to change out?
Can this(the ignition modual) cause the engine to run rough?
Is there something else that I should look for?
Thanks
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Re: Code 42 problem (BIG K)
I have had the code 42 problem and it was the module. I am sure there are other possibilities though. Remember, when you set timing, disconnecting est bypass connector with engine running will set code. Did you set timing recently? If so disconnect battery to clear and see if it comes back. Sounds like a great excuse to install a high performance module :D
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From: Woodland Ca
Re: Code 42 problem (Pete K)
Thanks for your reponces. I've been having the code 42 since the rebuilt...for 3 or more months or so. Havn't been able to run it down yet.
Everything was running great until 2 days ago,when I started having this rough running and lower power output.
No other codes could I find.
Could the ignition module have had a small crack that got bigger all of a sudden?
Can you see a problem with the module just by looking at it?
I've read in the manual say that I would have to take it into a Dealer to have it checked out. I understand the module cost around $20.00. Sounds like it would be easier and cheaper to buy a new on and slap it on!
Any thoughts?
You said high performance module. Can you go into detail about benifits/cost and where I can find one?
[Modified by BIG K, 11:40 PM 2/26/2004]
Everything was running great until 2 days ago,when I started having this rough running and lower power output.
No other codes could I find.
Could the ignition module have had a small crack that got bigger all of a sudden?
Can you see a problem with the module just by looking at it?
I've read in the manual say that I would have to take it into a Dealer to have it checked out. I understand the module cost around $20.00. Sounds like it would be easier and cheaper to buy a new on and slap it on!
Any thoughts?
You said high performance module. Can you go into detail about benifits/cost and where I can find one?
[Modified by BIG K, 11:40 PM 2/26/2004]
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Re: Code 42 problem (BIG K)
An ignition is a high failure electronic part. They are not prone to cracking. Heat kills them. They get a coating of grease where they bolt to the distributor. The accel unit I used was forty dollars and Accel claims increased coil saturation = more power. I am probably nuts but I thought module smoothed my rough idle some. Maybe in my mind but who knows. A wise thing to do is swap module with new. If you are wrong and this does not fix, you could put module in storage compt. for a spare. 250 miles from home you may need it someday.
[Modified by Pete K, 2:17 PM 2/27/2004]
[Modified by Pete K, 2:17 PM 2/27/2004]
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From: Woodland Ca
Re: Code 42 problem (Pete K)
Thanks Pete K. I was looking at prices and you are right. I was wondering about brands. Any better than the other?
So you would change the module before changing the fuel filter?
I'm thinking it's still OK since I did change it recently. I guess it wouldn't hurt to by a pressure guage also?
So you would change the module before changing the fuel filter?
I'm thinking it's still OK since I did change it recently. I guess it wouldn't hurt to by a pressure guage also?
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Re: Code 42 problem (BIG K)
I would buy the pressure guage regardless. a must have tool imo. If the filter is less than 6 months old or so I personally would lean towards the modude. I dont know what is the best one but I have had great luck with the accel. Probably all similar though. Regardless use fuel pressure guage to verify performance. Buy the one you can find with the longest hose. This will allow you to tape it to the windshield and watch while driving. This will tell you info under load and not just idle.I change my fuel filter every year. Cheap insurance!
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Re: Code 42 problem (BIG K)
Iv'e got code 42 also and haven't been able to track it down. I already changed the ignition module and i don't think it's the esp module, is your code 42 intermittent or does it always show up?
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From: Woodland Ca
Re: Code 42 problem (Damien89)
I've just got back from having the module checked...it's still good.
Damien89, I saw the post that said if you had used a timing light and disconected your advace it will through a code 42. I've disconected the battery and havn't put the module back in yet.
I'm going to hook up the guage after I do though, and see if it shows up(code 42) again while I'm checking the pressure.
The awnser your question...almost always. It seems that the code showed up more times than not.
I will post my findings though! :thumbs:
Damien89, I saw the post that said if you had used a timing light and disconected your advace it will through a code 42. I've disconected the battery and havn't put the module back in yet.
I'm going to hook up the guage after I do though, and see if it shows up(code 42) again while I'm checking the pressure.
The awnser your question...almost always. It seems that the code showed up more times than not.
I will post my findings though! :thumbs:
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From: Woodland Ca
Re: Code 42 problem (Pete K)
Pete K, I just hooked the battery and module back up. I then attached the pressure gauge up. The code 42 came back(after having the battery unhooked for 3 hour or so).
I'm also getting a reading of 39-40lbs.
Sounds like it's electrical to me. What do you think?
If you are refuring to the tree on page 6E3-A-49, I've already got it. I just need some help reading it. I even have a volt meter...you know one of the expensive kind that has the rubber armor on it. Don't know how to use it!
If you could help me from what I've done so far on the tree to move forward...that would be GREAT!
I'm also getting a reading of 39-40lbs.
Sounds like it's electrical to me. What do you think?
If you are refuring to the tree on page 6E3-A-49, I've already got it. I just need some help reading it. I even have a volt meter...you know one of the expensive kind that has the rubber armor on it. Don't know how to use it!
If you could help me from what I've done so far on the tree to move forward...that would be GREAT!
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Re: Code 42 problem (BIG K)
The tree I am refering to is in my favorite manual. It says to checkthe black and tan wire @ the ecm. You will get either 5 volts or 0 volts. This is with engine running. Probe and let me know what shows up.
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From: Woodland Ca
Re: Code 42 problem (Pete K)
OK. The ECM is under the instrument panel(says my manual). Where?
It also says that there are two connector wires...one white and the other black. Doesn't show a black and tan.
I guess I will see what you are talking about once I locate the ECM.
It also says that there are two connector wires...one white and the other black. Doesn't show a black and tan.
I guess I will see what you are talking about once I locate the ECM.
