car wont start on hot day after driving.

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babowc
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Joined: Mon Oct 25, 2004 3:26 pm
Car: 240sx
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hey guys.i just went to the post office to drop some stuff off and i been there about 20-30 mins and the car wouldnt start..

i have searched, but none seem to explain why my car is still running when i take the fuel pump fuse out... consistently at 1500 rpm.

the thing is.. i've had this problem a couple times already, but it only does it when its hot..could it be that my fuel pump is bad?.. (doesnt explain how it starts withOUT the fuse for the pump though..)

also when the car is running by no fuel pump, and i disconnect the TPS, the car just dies and doesnt want to start..same with the fuse.. if i plug it back in, it wont start for some reason.

i've got new plug wires, but i've been putting off the plugs and o2 sensor, however they seemed fine because i've been driving on them for the past month or two.. and its starting problems when the car is hot..

also, my distributor was a bit hot. (is that normal?)i guess all the heat in the engine bay didnt get to escape..?

please let me know what i can do to fix this!thanks!


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babowc
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Joined: Mon Oct 25, 2004 3:26 pm
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anyone?this is happening again..stalled out on a highway ramp T_T

vancouverbc
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Joined: Thu Oct 30, 2003 1:30 am
Car: 1991 240sx

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how long does the car run without fuel pump? I think 30 sec is normal.

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babowc
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Joined: Mon Oct 25, 2004 3:26 pm
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about 30 secs yeah.

so far, i unplugged the TPS and the O2 sensor.

if i plug in the o2 sensor.. there is NO throttle response at all.

if i plug the tps.. idle goes up to near 1500

vancouverbc
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Joined: Thu Oct 30, 2003 1:30 am
Car: 1991 240sx

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What does car do with the O2 sensor unplugged?

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babowc
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Joined: Mon Oct 25, 2004 3:26 pm
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nothing.burn alot of fuel.i just went out to start it..took like 6 cranks to start.. wtf?

then the idle was fluctuating 1000-1200.

hm.. :/

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babowc
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anyone??

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teddy
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Joined: Tue Dec 07, 2004 11:16 am
Car: Saab Turbo and MR2

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did you check the ecu for any codes? What all is done to the motor, or is it just stock?

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babowc
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Joined: Mon Oct 25, 2004 3:26 pm
Car: 240sx
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i havent chewcked the ecu..but the motor is stock.

now, lately the car takes a bit more cranks to start...i guess plugs are on their way out... i ordered a new set, so i'll update what happens after i put the plugs+o2sensor in.

if its not the plug or o2sensor.. i guess it'll be the fuel system?


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