Car won't crank but backfires

[csr ma71]

So the Supra won't start. I hear it crank like it's trying to but then nothing happens. Occasionally a backfire will happen but it still won't start. Sometimes when that backfire happens I smell fuel. I hear a metallic click type of sound like a sword being sharpened, but that's the extent of it. I don't hear the starter "ca ca ca" sound, the key is in the ignition and when I let go, I hear the metallic sound. It's been like this on and off for two years but this time it doesn't start even after a few hours left alone. Now it has a code 12.

I already rewired the CPS in the right configuration. Battery, starter is good. Any ideas? Thank you. 1988 Turbo.

 

[scottiedawg66]

possibly CPS is out 180 degrees. Backfire is caused by lean condition, muffler explosion is caused by rich condition. I dont know what code 12 is but TSRM can help you on that.


~scott

 

[lagged]

check the timing.

 

[Boostedstr8six]

....or rotted CPS wiring.

 

[steve_mk3]

Code 12 is intermittant power to the ECU.
I had your exact symptoms after I installed an engine.
Turned out that the CPS was installed 180 off. When I got the CPS worked out the car started up. I checked and rechecked all the grounds and that solved the code 12.

So I would start with some simple stuff, do you have spark? gas?
if so recheck the ECU and timing.

-Steve

 

[chriso]

How do you install the CPS 180 out. I can see a tooth maybe but 180???

 

[Boostedstr8six]

How do you install the CPS 180 out. I can see a tooth maybe but 180???

You could set #1 to TDC, line up the marks on the CPS, and forget to ensure that #1 is on the compression stroke.