car wont start

john_lauj · 04-16-2011, 04:31 PM

I have a 90 mk3. My car turns but it wont start. I had check sparks and its good. Also i have fuel coming as well. I check the fuel line. Sometimes the car will almost turnover but it wont. Anyone can give some tips. Its all stock. Oh and timing is good too.

cre · 04-16-2011, 11:32 PM

When did the problem start and what were you working on when it happened (if anything)? Have you tested the igniter and CPS? Any diagnostic codes? Is this a Turbo or non? Tested the fuel pump and fuel pressure?

spudz29212MKIII · 04-21-2011, 05:33 PM

I had this same problem when I first bought my Supra. I could crank it for hours and it would never start. The problem was the cam position sensor, which had nothing wrong with it at all. Its the connection and/or wiring harness. Our cars are old and the wires become weak an brittle over time PLUS the wires for the CPS run right over the head...bad news bears.

My temporary fix was to disconnect CPS connector, clean, re-attach, and make sure it had a good connection...well that didn't work. Next I simply just took the wires that ran over the head and gave them a good jiggle/shake and boom! Started right up. Later I did re-wire it and no problems since. Hope this helps.

04-16-2011, 04:31 PM	#1
john_lauj Stock Join Date: Mar 2010 Location: frresno Posts: 20	car wont start I have a 90 mk3. My car turns but it wont start. I had check sparks and its good. Also i have fuel coming as well. I check the fuel line. Sometimes the car will almost turnover but it wont. Anyone can give some tips. Its all stock. Oh and timing is good too.

04-16-2011, 11:32 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	When did the problem start and what were you working on when it happened (if anything)? Have you tested the igniter and CPS? Any diagnostic codes? Is this a Turbo or non? Tested the fuel pump and fuel pressure? __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

04-21-2011, 05:33 PM	#3
spudz29212MKIII 3" Exhaust Join Date: Mar 2008 Location: Columbia, SC Posts: 69	Cam Position Sensor I had this same problem when I first bought my Supra. I could crank it for hours and it would never start. The problem was the cam position sensor, which had nothing wrong with it at all. Its the connection and/or wiring harness. Our cars are old and the wires become weak an brittle over time PLUS the wires for the CPS run right over the head...bad news bears. My temporary fix was to disconnect CPS connector, clean, re-attach, and make sure it had a good connection...well that didn't work. Next I simply just took the wires that ran over the head and gave them a good jiggle/shake and boom! Started right up. Later I did re-wire it and no problems since. Hope this helps. __________________ Zach

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