Last night I changed my spark plugs because the car flooded. I cant remember if I drove the car or revved it after changing the plugs.

Anyway, after changing the plugs I decided to reset my PowerFC to re-learn the idle and ever since then the car will not rev past 2500rpm under WOT and if I really go easy on the pedal, maybe about 5-10% throttle, it will only go to 1500rpm. When I'm driving the car it will only rev to 1500rpm. I changed the sequential turbo control to off since I have NS twins, other than that everything is the same as it was before I reset the ECU. It was on the same base map before that its on now.

The car doesnt have any of the stock solenoids anymore so testing out the stock ECU isnt really an option, anyone got any input here?

 

I dont even think the PFC can go into limp mode. Will the car not rev even in nuetral, sounds like you already fouled the new plugs or messed up one of the plug wires. I have had cars that would start over and over without problem but as soon as you tried to rev them or drive them they bogged down and just acted horrible. It was fouled plugs.

 

Makes sure they wires are on correctly...leading 1 to leading 1 and trailing 1 to trailing 1, etc. it will still idle but once you rev the car, it will fall flat on its face since the "timing" is off since its not hooked up and firing in the proper sequence.

Tim

 

I was thinking maybe the plugs were messed up again but didn't take them back out yet. I don't get why they would be fouled already so fast, you think it has anything to do with getting 4 BUREQ9s instead of 2 BUREQ7s and 2 BUREQ9s? This is the second time since i've had the car that it fouls plugs right after I put them in.

 

I'll make sure to check that first thing tomorrow, I usually don't mix them up but I did change the plugs in the dark last night and couldn't see a thing at all. Thanks to both of you for the suggestions, I really appreciate it.

 

it shouldnt have anything to do with all 9's unless something else is out of whack with the fuel delivery or spark. Let us know what you find out as well.

Tim

 

OK tried taking the spark plugs out and cleaning them up, put them back in and nothing. Checked the spark plug wires and theyre good and in the correct order but still having the exact same problem. I'm going to have to wait until later today to go get more plugs to test them out. Any other suggestions please suggest them, nothing can hurt right about now.

On a side note, I highly doubt it'd have anything to do with my problem but when I was given the spark plugs, two of them were silver and two of them were gold but they are marked exactly the same on the plugs. I'm going out on a limb but does anyone see this as a problem?

 

I'm now going to go about re-installing my TPS and adjusting it. One of the screws is missing so its alittle too easy to move around, thinking (hoping) maybe it moved on its own and this could be the problem.

 

OK the TPS was not on right so I reinstalled it and adjusted it to proper voltage range, now my problem is the car will not stay on by itself. My original problem of not being able to rev over 2500rpm is solved though so thats good, it must have been the TPS. Now I have to try and figure out why the car wont stay on without me giving it gas.

 

proper voltage range for both the narrow and full range on the throttle position sensor? what ecu do you have?

Tim

 

OK PROBLEM SOLVED.

When I did the NS conversion back in the day I removed the TPS and never put it back properly. Since then my TPS has been what I've been using to adjust the throttle plates and must not have been getting any voltage without me realizing it. So the other day when I reset my ECU it must have been reading the TPS as broken because of the lack of voltage. Today I re-installed the TPS properly and then adjusted the screw on top of the TB used for adjusting the throttle plates. Problem solved. Car runs fine again and has a nice, smooth idle.

Thanks to both djseven and Tim Benton for suggestions, I really appreciate it.

 

glad to hear!

Tim