my tow truck is down and there is a poker run this weekend. help!!
 

ok, so the last couple of days, my truck has been running funny. under light acceleration it was fine, but when you punched it, it would backfire through the exhaust. i checked the timing and it was ok. so im at a light yesterday, idling rough, i went to take off and it hesitated. it was around 200 rpms deciding whether to go or die, and about that time it started "dieseling". no start after that. i waited for a tow truck, and right before he got there i decided to turn it over and see what it does. It was the loudest freaking backfire through the exhaust i have every heard. got it towed back, and going to work on it today. weve got a poker run here tommorrow :eek:

the truck is a 1993 chevy k3500 with a 454.

help :(

Re: my tow truck is down and there is a poker run this weekend. help!!
 

damn, i wish i would have checked last night. i told someone and they assured me it jumped time. so i ripped everything down and the timing chain feels tight. i cant get the cover off, do you have to pull the oil pan to get the timing cover removed? I might as well change the chain while im there. how hard is the ignition module to change. just unbolt and bolt a new one up?

Re: my tow truck is down and there is a poker run this weekend. help!!
 

Loosen the oil pan and drop it down in the front to get the timing cover over the lip on the pan.

Re: my tow truck is down and there is a poker run this weekend. help!!
 

Yep, I would put money on the ignition module. Bolt the front of it back up, and go get the module. I have never heard of a motor jumping time. Its a little piece that is in the shape of an apple slice with squared off corners. It sits directly under the distributor cap. 10 minute install.

Oh yeah, label your wires. :D