turns over but wont fire.

tak2099 · 05-29-2010, 04:26 AM

Well, there is no spark and no fuel pressure. The other day this happened but after wiggling everything imaginable it started. So, I suspect a wiring problem. Any suggestions of grounds or anything to check would be awesome. So far i have checked the fuel pump wires....no power. The fuel pump relay clicks when you turn the key on. but the Efi main relay doesnt seem to be getting ignition voltage. That's about as far as I have gone. I was going to check the ECU next.......I hate wiring.

cre · 05-29-2010, 04:00 PM

Start with the tech tips in the TEWD (in the back of each system's diagrams

), then start measuring voltage drop across the signal lines. I'd focus on the TCCS wiring and the Ignition circuit.

Cameroonski · 05-31-2010, 11:12 PM

I had a very similar problem. Does the check engine light come on when you turn the key to ON? Mine didn't, and it ended up being a loose fuse on drivers side kick panel (The Ignition Fuse). Whenever my car doesnt start i just give that a wiggle and it fires right up. I learned almost everything about the efi system until then, so if you have any questions i probably have the answer... including computer stuff if you test that.

tak2099 · 06-06-2010, 02:57 AM

Thanks for all of the input, I haven't had time to look into it yet, but I will most likely be needing some questions answered. Also sweet new ride Cre.....looks amazing!

05-29-2010, 04:26 AM	#1
tak2099 3" Exhaust Join Date: Jul 2007 Location: ohio Posts: 90	turns over but wont fire. Well, there is no spark and no fuel pressure. The other day this happened but after wiggling everything imaginable it started. So, I suspect a wiring problem. Any suggestions of grounds or anything to check would be awesome. So far i have checked the fuel pump wires....no power. The fuel pump relay clicks when you turn the key on. but the Efi main relay doesnt seem to be getting ignition voltage. That's about as far as I have gone. I was going to check the ECU next.......I hate wiring. __________________ 1988 supra turbo. In process of modding:Roll cage, seats, dp, 3" intercooler, fuel upgrades, and turbo upgrades next.

05-29-2010, 04:00 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Start with the tech tips in the TEWD (in the back of each system's diagrams ), then start measuring voltage drop across the signal lines. I'd focus on the TCCS wiring and the Ignition circuit. __________________ 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 --->

06-06-2010, 02:57 AM	#4
tak2099 3" Exhaust Join Date: Jul 2007 Location: ohio Posts: 90	Thanks for all of the input, I haven't had time to look into it yet, but I will most likely be needing some questions answered. Also sweet new ride Cre.....looks amazing! __________________ 1988 supra turbo. In process of modding:Roll cage, seats, dp, 3" intercooler, fuel upgrades, and turbo upgrades next.

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05-31-2010, 11:12 PM	#3
Cameroonski 3" Exhaust Join Date: Dec 2009 Location: Austin, Tx Posts: 68	I had a very similar problem. Does the check engine light come on when you turn the key to ON? Mine didn't, and it ended up being a loose fuse on drivers side kick panel (The Ignition Fuse). Whenever my car doesnt start i just give that a wiggle and it fires right up. I learned almost everything about the efi system until then, so if you have any questions i probably have the answer... including computer stuff if you test that.