1994 3.4L V6 Code 75 - Team Camaro Tech
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post #1 of 4 (permalink) Old Sep 20th, 06, 10:20 AM Thread Starter
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1994 3.4L V6 Code 75

I have a 1994 camaro 3.4L V6 auto.

I have had my car for 1yr and was running great until i had alot of work things put into it ... new plugs-wires and everthing flushed brakes you name it! It just started to run like sh#t and took my car to auto zone to have the code checked that was comeing up and they say its a code 75 EGR valve sil. # 3 .. i replaced the EGR valve with a new one and still got the Code ! Hard to start when cold.. if i go to work and let it sit for 4 or 5 hours it starts hard! like a sticky valve but.. when i drive off and get upto 20mph its stops and will not come back for 3 or 4 days. The check eng. light will only come on when im slowing down from 55mph or more !!! The code came up and i replaced the wires to the EGR and still got the same thing.. i checked the wires to the PCM and all came back good! i cleaned around the PCM to get the dust out from around it! still came up with the same thing.. so i was think'n it was the PCM ? maybe !!! so i just took back the new EGR valve to save myself 300bucks so i can get a new PCM! now that i have the old EGR valve in the check eng. light has not come on! it would do it all the time when slow down from 55mph or more.. but now its doing ok... but when i go to start my car it will not start until the 2nd or 3rd time i try it !! and i can see alot of smoke come out when i start it.. but it only will start that way if it sits more then 4 or 5 hours sometimes not until the next day.. IM so lost i donno where to check!!!

Last edited by 94camaro3.4; Sep 20th, 06 at 11:06 AM.
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post #2 of 4 (permalink) Old Sep 20th, 06, 11:05 AM Thread Starter
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Re: 1994 3.4L V6 Code 75

Can anyone help?
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post #3 of 4 (permalink) Old Sep 20th, 06, 11:54 AM
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Re: 1994 3.4L V6 Code 75

I have a '94 3.4L and have the same issue with the SES light coming on when slowing down from highway speed. It stays on until the engine is shut off and stays off until the next trip on the highway. I have no help for you on this one as I'm trying to figure it out myself. I did want to chime in and tell you I found a place on ebay that sells used "tested" so they say PCM's for $63.00. Do a search they'll pop right up. The only question I had was if the PCM would need to be flashed for my particular car as I've heard that might be the case. I called the place from ebay and the guy couldn't really answer that question so I've held off on buying one. Might save you some bucks if you do need a PCM. I'd consider that a last result though.


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post #4 of 4 (permalink) Old Sep 20th, 06, 04:29 PM Thread Starter
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Re: 1994 3.4L V6 Code 75

Hey thanks .. MY car is doing the same thing !!! the light wouldnt go off ... but ya i just took my car in to have it looked at for free and they told me it was the PCM and ya it has to be flashed .. but thats only 85bucks and the pcm is 198 .. so im just going to spend the 300bucks for it .. i dont trust anything from ebay.. and the part is new so.. its better if just get the new part.. my friend has the same car and he has 250,000 on it and only replaced the key. lol so.. im keep'n this car for a long time!

Thanks for the help.
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