rx-7tt4life

ok i had a problem i had a few wiring issues with my fd its a 93 i fixed everything so i decided to do plugs and wires fuel filter drove it everything ran perfect a day later i started my car and it ran like poop haunting idle never leveled off i drove it and when in decel it back fired a couple of times ok now i've read a lot about idlein issues all over this forum and to me it seems like a dashpot hears the kicker i haven't had a dashpot since a bought the car about a year now so y all of a sudden does it seem like i need one

MR_Rick

iTrader: (7)

What spark plugs you running? I had the same issue and I put new spark plugs in 9 heat rage all around and now the car idles fine and doesn't sputter or back fires as much as it used to. Also what are you mods?

rx7rcer09

NGK 9's are what i use all around, it could be a possible plug issue or your car may need the idle adjustment screw played with. also check to see if your wires are in the proper order.

camajo

iTrader: (3)

Do a search on Throttle Position Sensor. Make sure those voltages check out as well.

rx-7tt4life

ill have to check out what the heat range i put in but mods intakes exhaust computer was tuned front mount and i have to check out the tps voltages now are you talking threw a scan tool or with a dmm and i did adjust the idle screw it helped the idle but still back firing thanks everyone for your help

rx-7tt4life

ok tps good spark plugs ngk 9 good turned idle screw 1/4 turn idle went back to normal but i feel like thats cheating and there's one other thing when i took the plugs out of my engine there were leading plugs in trailing holes and vice versa does any one kno y that would be was it just a screw up or do people do that for certain reasons

MR_Rick

iTrader: (7)

Well if they are all 9s then it doesn't matter if they are leading or trailing. What do they look like? This is what mine looked like when it was running like crap.

NEWGENRX7

what wiring problem did you fix?

rx-7tt4life

thats what my plugs looked like when i took the old ones out idk about the new ones yet ill have to check and i had oil pressure coolant temp and rpm gauge didn't work and i have to codes one for a knock sensor and another for the aws (accelerated warmup system ) but i've had those codes threw the last 8 months and 1 week ago it just started acting up so i dont think those matter

hisupyo

iTrader: (3)

Did you possibly knock your tps out of spec? I had this exact issue on my fd.

I would..

1) get the car up to operating temperature
2) plug a volt meter into the second from top wire and check the voltages as you move the throttle body.
3) repeat this on the bottom wire.
4) Loosen the screw and adjust if necessary.

This made a world of difference for me with my idle hunt, hanging idle, and crappy idle issues.

I would look into what the correct voltages are.. But generally if its a range of around 1-5v on both I find it works fine.

rx-7tt4life

ah thank you ill try that and let you kno how it goes

rx-7tt4life

well tps is adjusted perfectly same problem im running out of ideas sucks there arent any one around southern mass with a rotary shop

rx-7tt4life

thanks everyone for there help i guessed at it and fixed my car it was a bad intake manifold gasket for anyone else that reads this thread