Starting problem
06-08-09, 11:50 PM
#1
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Starting problem
hey names ryan i just bought my lexus about a month ago its a 1992 sc400 black got about 161 k on it it seems to me that everytime i start the car cold it runs fine but then when the engine heats up to normal temperature and then i turn it off it wont start....it wikll just go up to 1000 rpms then putter down and die... also my heat shield is crackling a lot ..butt i got new fuel lines and a fuel filter but the car still will just die randomly?? any ideas at all ?? i was going to get diagnostics ran at this place called rocket motors ?? but i ws hoping to get an opinion on here
06-10-09, 09:03 PM
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like the car will run fine for days without doing this problem and then all of a sudden it wont want to start so i will have to prime the fuel pump or turn the igniton like three times then turn it over its a weird problem really want to fix so you so check the battery when its running?
06-10-09, 10:04 PM
#7
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this guy was having somewhat the same problem as you
https://www.clublexus.com/forums/per...er-signal.html
I think the problem was the Idle Air Control Valve (IACV) was dirty and so was the maf.
https://www.clublexus.com/forums/per...er-signal.html
I think the problem was the Idle Air Control Valve (IACV) was dirty and so was the maf.
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06-11-09, 12:20 AM
#8
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so how much moolah will that run me... i dont know much about the tundra engines yet. whats an maf and where would the idle control valve be at?
06-11-09, 05:31 PM
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The MAF is right behind the airbox. Here is a tutorial on how to clean the iacv:
https://www.clublexus.com/forums/per...rol-valve.html
06-11-09, 06:11 PM
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I had similar problems and it turned out to be a bad fuel pump relay/main relay.
Does your car also have problems starting when its really hot inside?
My car would start fine in the cold, but after it was driven for a while, it would not warm start. The car starts up then sputters and dies like you said. Then when I try to start it a 2nd time, it keeps cranking but doesn't start.
Does your car also have problems starting when its really hot inside?
My car would start fine in the cold, but after it was driven for a while, it would not warm start. The car starts up then sputters and dies like you said. Then when I try to start it a 2nd time, it keeps cranking but doesn't start.
06-12-09, 08:48 PM
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ya thats exactly it man i does this randomly at times but then rides smooth i really want to fix it could i fix it like at home ??? or would i need to take it to the shop
06-20-09, 05:04 PM
#14
heh, ever replaced a fuel pump before? its kinda nasty. dunno bout the sc's but from what ive learned you have to take the pump out from the gas tank, which means lotta gas comes out lol, not fun to do on any car w a full tank or even a 1/4 tank
Last edited by eight; 06-20-09 at 05:06 PM. Reason: quoted the wrong person lol