Strange throttle issue
02-14-2008, 07:49 PM
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Strange throttle issue 5.3 with ETC and custom tune, been working fine for a couple of years.
Lately when I'm driving and I stomp on the gas it revs up to 4000rpm or so and then it cuts off like I left off the throttle completely. If I do let off the throttle and get back on it, the same thing happens again, back to 4000rpm and it cuts out.
In neutral or park it will rev to the limiter at 6100rpm without problem.
I've been able to get a couple of codes to come up. Once I held the gas pedal down even after it cut out and I ended up with a P1518. I've checked the connections from the pedal to the ETC and didn't find anything. Reset the code and it didn't come back. Today I got a P0230 which points at a fuel pump relay, but that seems to be working fine.
Could the relay not be getting enough voltage and the pump is cutting out?
I've got a HP Tuner's Log file of it happening but I can't figure anything out from it.
Lately when I'm driving and I stomp on the gas it revs up to 4000rpm or so and then it cuts off like I left off the throttle completely. If I do let off the throttle and get back on it, the same thing happens again, back to 4000rpm and it cuts out.
In neutral or park it will rev to the limiter at 6100rpm without problem.
I've been able to get a couple of codes to come up. Once I held the gas pedal down even after it cut out and I ended up with a P1518. I've checked the connections from the pedal to the ETC and didn't find anything. Reset the code and it didn't come back. Today I got a P0230 which points at a fuel pump relay, but that seems to be working fine.
Could the relay not be getting enough voltage and the pump is cutting out?
I've got a HP Tuner's Log file of it happening but I can't figure anything out from it.
02-14-2008, 07:56 PM
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Wonder if this is one of the "reduced power mode" deals
that comes from the alpha-N, speed-density, MAF cross-
checking and limits the throttle. Can you see that the
actual throttle angle (not pedal position) is pulling back?
Throttle, injector (fuel pressure?) or spark has to be
cutting.
A bad fuel system obstruction (filter, pump, pump electrical
or even single injector) might let you rev unloaded but bind
you up when more fuel is needed. Look at the O2 sensors
for a lean dive?
that comes from the alpha-N, speed-density, MAF cross-
checking and limits the throttle. Can you see that the
actual throttle angle (not pedal position) is pulling back?
Throttle, injector (fuel pressure?) or spark has to be
cutting.
A bad fuel system obstruction (filter, pump, pump electrical
or even single injector) might let you rev unloaded but bind
you up when more fuel is needed. Look at the O2 sensors
for a lean dive?
02-17-2008, 05:19 AM
#4
got the same thing today.. just got the car other day its a 00" 90k on chasis 40k on motor.. did seafoam, oil change, fuel filter (original), PVC valve and a optima battery after a nice WOT run or 2 the car hits 2,100-2,400 cuts out there and then keeps climbing to 6k im thinking TPS sensor or something.. SES code is showing im going to check it tomorrow
Ryan
Ryan
02-17-2008, 07:30 AM
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I started checking the harness yesterday and found the wires going to the knock sensors had gotten cut. It started raining so I didn't get a chance to pull the intake but I'll do that today. I'm not certain that is what is causing my problem but I'll fix that before I go any further.
