Miss while at constant speed
05-11-2011, 09:28 AM
#11
I'm betting its an ICM or a boot connecter.
When you said you changed the coil pack did you change just the coil and reuse the old boot connecter or was the boot connecter new as well?
The boot connecters can sometimes cause misfires. I had it happen with my A4. Experienced a misfire on cyl 2 first tried a new plug.. didn't end up fixing it. Moved cyl 2 coil to cyl 1 - misfire moved as well.
I figured it was a bad coil so I bought just the coil pack (no boot connecter).
Upon installation I still had a misfire on cyl 2 so I swapped a good ICM with mine - no luck.
Last thing I tried was swapping the boot connecter and thats what ended up being the culprit.
Good luck!
Jason
When you said you changed the coil pack did you change just the coil and reuse the old boot connecter or was the boot connecter new as well?
The boot connecters can sometimes cause misfires. I had it happen with my A4. Experienced a misfire on cyl 2 first tried a new plug.. didn't end up fixing it. Moved cyl 2 coil to cyl 1 - misfire moved as well.
I figured it was a bad coil so I bought just the coil pack (no boot connecter).
Upon installation I still had a misfire on cyl 2 so I swapped a good ICM with mine - no luck.
Last thing I tried was swapping the boot connecter and thats what ended up being the culprit.
Good luck!
Jason
05-11-2011, 03:29 PM
#13
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Are the ICM's connected together or grounded together through the metal plate they are bolted to on the airbox?
I cleaned the plates conductive paste? under them in hopes the sensors are connected somehow through the metal plate. my car drove fine and seemed to have more power for ten miles and i noticed it but not as bad as I ended the trip.
Maybe put some thermal compound under them hoping they would connect to the plate under them more?
I cleaned the plates conductive paste? under them in hopes the sensors are connected somehow through the metal plate. my car drove fine and seemed to have more power for ten miles and i noticed it but not as bad as I ended the trip.
Maybe put some thermal compound under them hoping they would connect to the plate under them more?
05-11-2011, 05:08 PM
#14
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I let it sit for 40 mins went and drove it again. It was fine for 15 or so miles then it started again and got worse from there. So I am thinking its the ICMs they look original and maybe when they heat up they start to malfunction?
I logged one misfire on cylinder 5 while driving (the only replaced coil) while the car was running without noticeable misses, then 15 mins (15 miles) later I could notice it completely like before.
So messing with the ICM's seemed to make the car work for 10 or 15 miles and then the problem comes back?
I called the dealer and they were $205.00 per
I logged one misfire on cylinder 5 while driving (the only replaced coil) while the car was running without noticeable misses, then 15 mins (15 miles) later I could notice it completely like before.
So messing with the ICM's seemed to make the car work for 10 or 15 miles and then the problem comes back?
I called the dealer and they were $205.00 per
05-11-2011, 05:33 PM
#15
I let it sit for 40 mins went and drove it again. It was fine for 15 or so miles then it started again and got worse from there. So I am thinking its the ICMs they look original and maybe when they heat up they start to malfunction?
I logged one misfire on cylinder 5 while driving (the only replaced coil) while the car was running without noticeable misses, then 15 mins (15 miles) later I could notice it completely like before.
So messing with the ICM's seemed to make the car work for 10 or 15 miles and then the problem comes back?
I called the dealer and they were $205.00 per
I logged one misfire on cylinder 5 while driving (the only replaced coil) while the car was running without noticeable misses, then 15 mins (15 miles) later I could notice it completely like before.
So messing with the ICM's seemed to make the car work for 10 or 15 miles and then the problem comes back?
I called the dealer and they were $205.00 per
05-11-2011, 05:43 PM
#16
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I let it sit for 40 mins went and drove it again. It was fine for 15 or so miles then it started again and got worse from there. So I am thinking its the ICMs they look original and maybe when they heat up they start to malfunction?
I logged one misfire on cylinder 5 while driving (the only replaced coil) while the car was running without noticeable misses, then 15 mins (15 miles) later I could notice it completely like before.
So messing with the ICM's seemed to make the car work for 10 or 15 miles and then the problem comes back?
I called the dealer and they were $205.00 per
I logged one misfire on cylinder 5 while driving (the only replaced coil) while the car was running without noticeable misses, then 15 mins (15 miles) later I could notice it completely like before.
So messing with the ICM's seemed to make the car work for 10 or 15 miles and then the problem comes back?
I called the dealer and they were $205.00 per
205 for the icm? man... good thing I check ebay on everything I do.
Sold 35, thats good...
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
Then there's this one, but costs more
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
Then there's this other one, was more but now on sale.. why, haven't got a clue. Seems odd thou.
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
Hopefully get to order mine this week, along with new coils all around.
Chris
05-11-2011, 05:45 PM
#17
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ah ha!
so that's what that stuff was... had a feeling it might be dielectric grease. I didn't remove it though, when cleaning the ICM's.
05-12-2011, 06:03 AM
#18
We have BERU ICM's available below at a very competitive price check them out below!
Click HERE to order or for more information.
Let me know if you have any questions.
Jason
Click HERE to order or for more information.
Let me know if you have any questions.
Jason
05-12-2011, 07:50 AM
#19
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does anyone know if the problem I am describing sounds like the ICM's. Do they get worse when they heat up, like i was describing, I am guessing they are sinked to the metal plate under them in order to carry away heat? When they heat up they malfunction more?
05-12-2011, 08:39 AM
#20
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Well I drove it today and it was missing from the get go, I put some dielectric grease under the sensors and still the same problems. So I have no idea.
How much would it cost to take it into somewhere to tell me whats wrong with it?
How much would it cost to take it into somewhere to tell me whats wrong with it?