Need some help
#1
Need some help
Im kinda stumped right now. One of my current cars will not run on a stock ecu but will fire right up with a PFC. While the stock ecu is hooked into the car the injectors will not get a signal from the ecu. However, as soon as you plug in the PFC it gets a signal. What sensors would cause the stock ecu to not send signal to the injectors, yet at the same time the PFC will overlook and still send signal?
Appreciatte the help in advance.
Appreciatte the help in advance.
#7
RX-7 Bad Ass
iTrader: (55)
It may be a reverse situation, but I know one guy who had a car that ran fine on a stock ECU but not on a PFC. The front pulley "teeth" that go by the crank angle sensor were bent, and one ECU was pickier about it than the other. Worth peeking down there to make sure the teeth don't look jacked up.
Do you have stock injectors/fuel system on the car?
Dale
Do you have stock injectors/fuel system on the car?
Dale
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#9
Here is the kicker and I forgot to mention it earlier. It ran yesterday on the stock ecu, but today it will not. It is a fresh rebuild and I threw in some used plugs because I knew they would foul anyways. Well I let it idle in the driveway yesterday for about 20 mins and moved it around the driveway a couple times(which is probably how I fouled the plugs). So I put in new plugs this morning, keep in mind nothing else has been touched, and when I go to start it I get no fuel. Used a node light to check the injectors and they are getting no signal, thus I throw in the PFC and they get signal and the car starts right up? I really dont see what could cause this. I have tested both the stock ecus adn the PFC in another car and they all work fine. Im so tired of changing plugs and ECUs its ridiculous.