03-13-2006, 09:59 AM | #1 |
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Okay guys. What could it be?
Car still pings when 1) at operating temperature and 2) over about 1/4 throttle (or under load up hill).
It runs fine and hauls ass when it's still cold, but once it gets up to normal temp...I have to be very judicious with throttle position. It's driving me nuts. Here's what I've replaced: O2-sensors, TPS, plugs (colder too), wires, distributor, fuel pump, filter, MAF electronics (itsa C&L), Checked resistances in ACT and CTS...they're within normal. Tried different gas-stations and fuel injector cleaner...nada. Also have retarded base timing to 8...still does it; just runs hotter. The Balancer is a sealed SFI fluid piece. It started doing this gradually over a weeks-time after I changed to an electric fan. Car didn't show hot on gauge, but I wnet back to clutch fan instead...no help. ? ? ? ? Sorry to bring up this old topic. Does anyone have a ProM for 24# injectors I can try? That's about the last thing it could be
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03-13-2006, 12:48 PM | #2 |
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Re: Okay guys. What could it be?
Try unpluging the CTS (ECT) sensor and let it fail. The EEC will default to something like 210 and see if that helps. Just by doing a simple resistance check is not enough. This also applies to the ACT sensor.
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EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. |
03-13-2006, 03:11 PM | #3 |
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Re: Okay guys. What could it be?
Okay, I have unplugged each. separately. then started car. no different.
Checking the EGR vacuum (EVR) next to see if it's working. Found out the EEC will lean mixture if it senses the EGR is open...maybe it's sticking open and the thing is leaning a bit much The ping I heard today was definitely a lean-"crack" sound...head gaskets still there tho
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03-13-2006, 03:30 PM | #4 |
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Re: Okay guys. What could it be?
I have that 75mm ProM that is called for 30's that I am not using.
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03-13-2006, 04:13 PM | #5 |
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Re: Okay guys. What could it be?
The EGR will create a lean condition as you stated. Not to sure what the EEC does if it senses a bad EGR. Try disabling it in the tuner. I can not remember, do you have a Tweecer. If so can you datalog?
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EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. |
03-13-2006, 05:35 PM | #6 | |
3v's are slow
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Re: Okay guys. What could it be?
Quote:
no he does not
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03-13-2006, 08:12 PM | #7 |
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Re: Okay guys. What could it be?
Just thinking out loud but if an injector is stuck open, the EEC will sense this and try to lean out the mixture causing the rest to go lean.
I would also try running a cylinder balance test.
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EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. |
03-13-2006, 08:43 PM | #8 |
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Re: Okay guys. What could it be?
EGR is not functional except at part throttle cruise, Idle and WOT are not effected unless the EGR valve is stuck.
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03-13-2006, 09:30 PM | #9 | |
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Re: Okay guys. What could it be?
Quote:
and get that car finished up.....
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03-14-2006, 06:45 AM | #10 |
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Re: Okay guys. What could it be?
hey, check inside your distributor... all the way down to the hall effect sensor, and the CPS sensor... it is inside the distributor... so you might have to take the distributor off... just a thought... thats what mine was doing and i tore it down... 3 times in a row.. because of it
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