SR doesnt run any different when o2 sensor or tps are unplugged.

[redsx13]

In the process of diagnosing the problems my sr is having and i noticed that when i unplug the o2 sensor or the tps the car will not run any different. Someone back me up in saying that unplugging those sensors will cause a noticeable difference in the way that the car runs.

also the ecu is not throwing an o2 sensor code even when i run the car w/ o2 unplugged.

[Hijacker]

Unplugging the O2 just auses the car to run a little rich (open loop mode)

unplugging the TPS doesn't change the idle at all, but you will notice a power loss under load as well as some stuttering and misfire

[wzntha]

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[redsx13]

Unplugging the O2 just auses the car to run a little rich (open loop mode)

unplugging the TPS doesn't change the idle at all, but you will notice a power loss under load as well as some stuttering and misfire

Ok, but should'nt my ECU be throwing a code if the o2 is unplugged?

so if your car runs the same when the TPS is unplugged, you have a bad TPS, right?

and you said it will cause a power loss, so would you see this power loss in the turbo not spooling later than it normally does? (or is that just a leak somewhere?)

I checked the fmic piping for leaks, i remember someone mentioning that i can make a boost leak tester.(i would like to know how) anyway, do you think that an exhaust leak could cause the boost to be so low? (i also looked/felt for exhaust leaks and if there is a leak it must be small because i cant find any leaks.)

[redsx13]

Any thoughts?

[blinker_fluid]

Where did you get your swap from? Call them and ask about the mods it has. If they don't have the information then you don't know what tuning was done on the ecu or what aftermarket parts are on it or if all the parts are from the same motor set. Without knowing the history of the swap your best bet is to return everything to stock(ecu, maf, injectors). Try finding someone who will let you borrow these items before you buy them.

Another problem that would cause bad idle I haven't seen metioned yet is a leak in the manifold from a bad gasket (throttle body, intake mani, head) or a bent fuel rail http://www.240sxmotoring.com/srinpr.html. What kind of vaccum reading are you getting? Show some pics of the engine bay just so we can get a visual to rule out odvious stuff (like if you have an air filter installed, etc.)

[redsx13]

Where did you get your swap from? Call them and ask about the mods it has. If they don't have the information then you don't know what tuning was done on the ecu or what aftermarket parts are on it or if all the parts are from the same motor set. Without knowing the history of the swap your best bet is to return everything to stock(ecu, maf, injectors). Try finding someone who will let you borrow these items before you buy them.

Another problem that would cause bad idle I haven't seen metioned yet is a leak in the manifold from a bad gasket (throttle body, intake mani, head) or a bent fuel rail http://www.240sxmotoring.com/srinpr.html. What kind of vaccum reading are you getting? Show some pics of the engine bay just so we can get a visual to rule out odvious stuff (like if you have an air filter installed, etc.)

Ya, I already went back to the place i got the motor, he said it sounded like it was running fine, but the timing was off. then he adjusted the timing, but that diddnt work. he told me i needed to bring the car to a tuning shop and put it on a dyno.

i can get some pics tomarrow, its too dark rite now.