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Discussion Starter #1
Yea I installed my Dennis chip just a sec ago... took it out for a spin... I know its working cause the shifts and all that are higher and there is more power. But when I was crusing along at around 50-60 mph... it would all of a sudden down shift, then the check engine light would flash on then go off... then it would shift back to normal... is this part of the re-learning for my EEC??? Or do i got a bad chip.
 

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Clean your MAF dude.. common problem w/ our MN12s. And then after that may take a look at your battery terminals.. They tend to get corroded on occasion causing engine "reflex", clean them as well. :)
 

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Also, there's this sensor on our cars called the "Mass Air Flow Sensor". It goes bad after around 100,000 miles on most occasions. I'd check it out Brett. And while your at it.. change your oil.. and then tranny fluid. Oh and after all of that take some rubbing alchohol.. and lightly scrub the wires on the uh.. mass air flow sensor.. my 2 cents..
 

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It might be easier if you just took the chip back out, reset the computer, and see if the problem is still there.

It does not sound like a normal 'learning process' with the CEL coming on.

I had no such problems with my Dennis chip.
 

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Discussion Starter #7
Would it be from a bad connection with the EEC? I scrubbed off the silicon... but on the Tech Article it did say something about "If it gave any problems to sand off the silver until some copper shows to make sure its a good read.
 

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That is a possibility, and I can almost gaurantee you that Dennis will tell you to take the chip back out, and re-check the contact area.

That is why I suggested you take it back out and see if the problem is still there.
 

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Discussion Starter #9
so take it out and sand it more eh? i should see copper on there right? no silver on connector? or does that matter?
 

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I would take the chip out, reset computer, and see if problem is still there. If it is, it isn't the chip.

If the problem is not still there, then try cleaning the contacts some more, but don't get too carried away. If problem still persists, just give Dennis a call.
 

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I'm having a similiar problem with my chip I got from Dennis. For two weeks it was in the car with little problem. The only thing it did is, one day while cruising, the engine sputtered and rpms jumped 500rpm, and then they went back down. Last week I was crusing again, and the the engine did a similiar thing. It abruptly jumped 1000rpm, but never lowered. I gave it gas, but it just lost speed like it was in neutral. The check engine light came on. I turned off the car, back on, and it was fine. Fine for 5 minutes, and then the same thing happened. this happened about 4 times before I yanked the chip out. From inspection, it is possible that the connection isn't complete, but I haven't checked it yet. I don't know why it started acting up 2 weeks after I installed it though.
 

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Discussion Starter #13
I yanked it out and disconnected my battery last night. I got up this morning and reconnected the chip and battery. I let it idle for like 10-12 minutes. The idle did fluctuate like it said it would to find the correct idle. Im getting ready to go for a drive. Oh i also sanded some more of the silver layer away to see if its a possible bad read. If it does it again ill try sanding it once more, if that dont do it... I'll give Dennis a call.
 

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cougar_ricer said:
I yanked it out and disconnected my battery last night. I got up this morning and reconnected the chip and battery. I let it idle for like 10-12 minutes. The idle did fluctuate like it said it would to find the correct idle. Im getting ready to go for a drive. Oh i also sanded some more of the silver layer away to see if its a possible bad read. If it does it again ill try sanding it once more, if that dont do it... I'll give Dennis a call.
Any updates on your possible chip contact problem?

I am having similar problems and I also wonder if I should pull chip out and sand off the silver on the eec contacts.
 

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you guys definitely gotta get rid of all the silver on the contacts...use a very high grit sandpaper to avoid accidentally deep-gouging the contacts.....just sand away until they look like the color of a brand new penny......if it still doesnt work, then you will have to troubleshoot other stuff
 
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