| From | Message |
Travis
Unregistered
3/02/2001
13:31:52
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 Subject: spark knock
IP: Logged
Message:
I have a '97 Dakota w/ a 3.9 L (50,000 mi). After the engine warms, I can hear what sounds like soft spark knock. It doesn't matter what fuel I run and have tried some good fuel system cleaner. I am running properly gapped Bosch Platinum plugs - wires and such are good. Any suggestions?
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garth
Unregistered
3/02/2001
13:41:06
| RE: spark knock
IP: Logged
Message:
First thing everyone is going to tell you is that you CAN NOT run platinum plugs. You need to go to a colder plug. What everyone here seems to run is AUTOLITE 3923's and that gets rid of the ping.
Garth
2000 QuadCab 4x4 V6 5 Spd
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Bernd
GenIII
3/03/2001
00:10:26
| RE: spark knock
IP: Logged
Message:
Yup...I've been running the Autolite 3923's for some time now in the V6 ('97). They work excellent. Others have switched over as well. Set the gap at the factory specs though. (Unless you're running an aftermarket ignition and/or coil, that you can open them up another .005".)
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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Kris
GenII
3/03/2001
02:33:19
| RE: spark knock
IP: Logged
Message:
Hey Bernd, what about the accel coil? Would I have to gap my 3923's a little more?
Kris Harnack
1994 Dakota V6 SLT
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Bernd
GenIII
3/03/2001
10:34:20
| RE: spark knock
IP: Logged
Message:
You don't have to. But, you can try it and see how it runs. Set them at .005" larger.
The main reason for the aftermarket coils (without any other type of aftermarket ignition system installed) is to give you a more stable (hotter) spark throughout the entire RPM band. Stock coils work excellent under 3800-4000rpm, but start to lack on the voltage output after 4000rpm.
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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