Low Rpm Ping...
10-21-2003, 07:29 PM
#1
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Thread Starter
Join Date: Jan 2002
Location: Tucson Az
Posts: 35
I havent ever managed to get a straight answer from anyone at the other forum, so I am hoping there are some people here that may be able to shed some light on this problem I am having.
Under heavy throttle, somewhere around 3000-4000 there is one solid PING. Its VERY noteciable, and VERY random, but always in the 3k-4k range.
I have regrounded the ECU/Boost sensor/Engine, in hopes that it was the 3800 RPM stumble, but that was no good. I am going to purchase all BUR9EQ plugs today, and replace my plugs (which barely have 1k on them.) I have an SAFC, that I have tried to compensate for this ping by adding fuel. No good. Mods are in my sig, and believe me, I am way into 10 PSI by the time I hit 2000-2500.
Any help is GREATLY appreciated!
Jarrett
Under heavy throttle, somewhere around 3000-4000 there is one solid PING. Its VERY noteciable, and VERY random, but always in the 3k-4k range.
I have regrounded the ECU/Boost sensor/Engine, in hopes that it was the 3800 RPM stumble, but that was no good. I am going to purchase all BUR9EQ plugs today, and replace my plugs (which barely have 1k on them.) I have an SAFC, that I have tried to compensate for this ping by adding fuel. No good. Mods are in my sig, and believe me, I am way into 10 PSI by the time I hit 2000-2500.
Any help is GREATLY appreciated!
Jarrett
10-21-2003, 07:45 PM
#4
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Join Date: Jan 2002
Location: Tucson Az
Posts: 35
Originally Posted by pengaru' date='Oct 21 2003, 04:33 PM
what are intake temps and timing like at this moment?
Jarrett
10-21-2003, 07:48 PM
#5
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Join Date: Jan 2002
Location: Tucson Az
Posts: 35
Originally Posted by vosko' date='Oct 21 2003, 04:34 PM
maybe its a misfire
Damn I miss you....
I dont think its a misfire. It sounds like a midget taking a ballpeen hammer to my block.
Only one, only under high load, and only at 3000-4000.
I have some theories, one being that I am generating too much boost at that area (I am well at or above 10 PSI at that range). Or possible I have a lazy injector. Or bad plug. Whatever it is, its VERY noteceable, and all I have consulted that run the same setup I do, do not have this problem. Very perplexing.
Just wondered if anyone here has encountered this before?
10-21-2003, 08:02 PM
#8
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Join Date: Apr 2002
Location: IL
Posts: 2,930
Originally Posted by Apex13B' date='Oct 22 2003, 12:53 AM
I honestly think that its a secondary lazy injector. Its knocking at the transition point
Had a car with a ghetto rigged fuel pump switch wired into the EGI main fuse by the PO, shitty switch, tiny gauge wire, all sorts of strange problems resulted from it. Some of which were stumbling at that transition, then ultimately it would get so bad random dying ocurred. Was trying to pull too much current through these small wires that were ran to the stupid switch.
10-21-2003, 08:06 PM
#10
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Join Date: Nov 2002
Location: Colorado Springs
Posts: 1,679
Originally Posted by pengaru' date='Oct 21 2003, 08:02 PM
Good point. Also, injector may be fine, it could be wiring associated with the injector(s).
Had a car with a ghetto rigged fuel pump switch wired into the EGI main fuse by the PO, shitty switch, tiny gauge wire, all sorts of strange problems resulted from it. Some of which were stumbling at that transition, then ultimately it would get so bad random dying ocurred. Was trying to pull too much current through these small wires that were ran to the stupid switch.
Had a car with a ghetto rigged fuel pump switch wired into the EGI main fuse by the PO, shitty switch, tiny gauge wire, all sorts of strange problems resulted from it. Some of which were stumbling at that transition, then ultimately it would get so bad random dying ocurred. Was trying to pull too much current through these small wires that were ran to the stupid switch.