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Dieseling condition with e-force?

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Old Sep 29, 2010 | 01:46 PM
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Originally Posted by PowerLabs
Even if the BAP was commanding full power to the fuel pump no matter what, you'd still not have a running engine since that requires the PCM to tell the fuel injectors to fire and the coil packs to produce a spark. No injector signal = no engine running. No ignition signal = no engine running either...

Not to mention the fact that if the BAP really didn't shut off it'd burn itself out.

Good points. No spark, no injectors, no run. Also, BAP is on a switched source for voltage.
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Old Sep 29, 2010 | 04:01 PM
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Hey Motorhead 47.....all the years I lived in Crestview....and you were right down I-85.....damn!

I would have hooked up with you to pick your brain on mods to my (old) 99 FRC. I now have a '09 Z06 now and am looking to do a E-force (when it comes out) on my Z..I might need to pick you brain then
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Old Sep 29, 2010 | 04:07 PM
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Originally Posted by ghostmech
Hey Motorhead 47.....all the years I lived in Crestview....and you were right down I-85.....damn!

I would have hooked up with you to pick your brain on mods to my (old) 99 FRC. I now have a '09 Z06 now and am looking to do a E-force (when it comes out) on my Z..I might need to pick you brain then
You got it!...will work for beer!

It will be interesting to see Edelbrock's cooling solution for your Z06. You can't stack a Z06 oil cooler, supercharger heat exchanger, a/c condenser and then a radiator in that order and expect it all to stay cool...not going to happen....ask me how I know! One big heat soak sam-mich'!

Last edited by Motorhead-47; Sep 29, 2010 at 04:10 PM.
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Old Sep 29, 2010 | 04:40 PM
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just curious, what is dieseling?
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Old Sep 29, 2010 | 05:13 PM
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Originally Posted by ShowcaseC6
just curious, what is dieseling?
After the car is turned off, the motor tries to stumble and run for a few seconds instead of flat shutting down
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Old Sep 29, 2010 | 07:04 PM
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stuck injector
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Old Sep 29, 2010 | 07:10 PM
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Originally Posted by carlrx7
stuck injector

I have 8 new ones so where to begin!

Maybe I should just get a new set of 60s and tune from there.


Elmer
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Old Sep 29, 2010 | 07:22 PM
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Originally Posted by eboggs_jkvl
I have 8 new ones so where to begin!

Maybe I should just get a new set of 60s and tune from there.


Elmer
You think one bad injector would cause dieseling? Not sure why you'd want to go with a new set of larger 60lb injectors and introduce yet another calibration variable. The 52lb injectors that come with the Edelbrock kit are the same Bosch injectors as used in the ZR1.

Last edited by Motorhead-47; Sep 29, 2010 at 07:25 PM.
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Old Sep 29, 2010 | 07:28 PM
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Originally Posted by Motorhead-47
You think one bad injector would cause dieseling? Not sure why you'd want to go with a new set of larger 60lb injectors and introduce yet another calibration variable. The 52lb injectors that come with the Edelbrock kit are the same Bosch injectors as used in the ZR1.
And, again, shutting the car off disables ignition, so even IF an injector was stuck open(it probably isn't; the car would run like crap and backfire like crazy if it was), AND a single cylinder receiving fuel was enough to keep the entire engine running (it isn't), you still wouldn't have ignition...
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Old Sep 29, 2010 | 07:33 PM
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in days of old cars desieled due to glowing deposits in the combustion chamber lighting off fuel that was still being supplied by the carb..the ignition system has nothing to do with it.... sounds like you have injector[s]dumping fuel into cylinders...why ????? improper wiring...bad injectors...faulty ground...?????
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Old Sep 29, 2010 | 07:59 PM
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What's your target idle speed? What's your base idle spark advance set for at that idle speed?
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Old Sep 29, 2010 | 09:45 PM
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Target Idle:
650 Rpm

Idle spark advance:
23
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Old Sep 29, 2010 | 09:46 PM
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Originally Posted by eboggs_jkvl
Target Idle:
650 Rpm

Idle spark advance:
23
Normal rpm although 23 degrees is a little bit much at idle. Try taking out 3-5 degrees at idle and see if that helps. FYI stock idle timing is 13 degrees I believe.

Any other "driveability" issues showing their face?...looking for clues here.

Last edited by Motorhead-47; Sep 29, 2010 at 09:56 PM.
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Old Sep 30, 2010 | 12:27 PM
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i run 15 degrees at idle. and its butter smooth, but i dont think thats your problem
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Old Sep 30, 2010 | 02:05 PM
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Originally Posted by carlrx7
i run 15 degrees at idle. and its butter smooth, but i dont think thats your problem
Not sure why an otherwise stock setup would require 23 degrees of base idle timing. Easy enought to change, test, verify and eliminate as a possibility.
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Old Sep 30, 2010 | 05:00 PM
  #36  
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I would look at A/F and timing.
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Old Sep 30, 2010 | 10:03 PM
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is there a way of checking to see if the coils are energized while the ing is off--injectors too? This might be an ECM hardware problem and nothing with the tune . Just a thought. sorry
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Old Sep 30, 2010 | 10:15 PM
  #38  
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Originally Posted by Motorhead-47
Not sure why an otherwise stock setup would require 23 degrees of base idle timing. Easy enought to change, test, verify and eliminate as a possibility.
I think the installer said my base timing was 12 degrees.
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Old Sep 30, 2010 | 10:18 PM
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I dropped the idle spark back to stock (13). It was late so I didn't get a chance to run a scan on it and check for the Dr. D. I'll check it tomorrow.

Elmer
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Old Oct 1, 2010 | 01:41 PM
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Dr. D. has left the house. Problem solved. Car shut down perfectly on my test drive.

Elmer
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