2002 gmc Sonoma crank no start
Asked by morlan63 Dec 31, 2013 at 09:37 PM about the 2002 GMC Sonoma SLS 2WD
Question type: Maintenance & Repair
I replaced a leaky timing cover on my 2002 gmc Sonoma and it cranks but will not start. the engine has 5000 miles, it is a crate motor I put in last year, the crank shaft position sensor is new and so is the ign modual, the coil tested fine the cap and rotor are new and plugs and wires, 12 volts at the battery. and there is plenty of fuel psi. I checked all the plugs for spark and nothing, I have ran tests on the crank sensor, ign modual, coil, several times and all is fine. I have done all I know how and im at a dead end. please help.
5 Answers
I would still have spark in that case however no its not. Im just going to set it ablaze tonite Im done. Thank you though
stephend103 answered 10 years ago
I believe the crankshaft sensor goes in the side of the timing cover. did you replace this sensor after you did the timing cover? Is it possible you could have damaged the connector or wiring when you when you did the t. cover job?
It goes under the cover and there are no broken wires or damage. I did a test with my meter with ign on I turned crank shaft by hand and the meter showed on and off as I turned the shaft. Thank you anyway. Happy new year.
Thank you to those of you that replied. I was at it again this morning testing everything I had tested many times before and the last thing I tested was the crank shaft position sensor and like the many other times I checked it it was fine. So I picked everything up and thought what the heck lets crank it for the sake of it and BAM the stupid truck started, so I took it for a drive and filled the tank and it so far is doing just fine. Everyone have a nice new year.
For anyone else crank sensor wiring is subject to breaking wires INSIDE insulation, oil contamination in conecctor will make for a hair pulling good time. When checking crank sensor signal you should have one wire 5+ one center I believe that is reference 5- and ground. If any of those elements are missing a no spark condition can exist, usually the vehicle will toss a correlation code prior to this issue.
