chevykid1994

Alright I need some help with my truck. I got it about 5 months ago as a project truck. Replaced engine and trans. Engine ran great before being pulled from parts truck. Got it in the other truck now and it wont start. Can spray starting fluid in tb and all it does is pop and backfire through tb. Need some help asap. Thanks in advance.

burhead1

Make sure the grounds around the thermostat housing are grounded. Make sure your crank sensor is connected. It sounds like the timing is out, you will have to crank to TDC and check under the distributor cap, make sure the rotor is close to number 1. Does not have to be dead on but close, when you do get it going you will need to do a crank relearn using a scanner.

chevykid1994

That was the exact problem. Got it running last night. But what do you mean by having to do a crank relearn?

burhead1

using a scanner it tells the computer the variation between your crank and cam, if not done can cause engine light to flash on hwy and poor fuel economy. Should be done any time cam, crank sensor, computer or engine is replaced.