QuestionI JUST REPLACED THE ENGINE OUT OF MY 1997 GMC K1500 SUBURBAN. I AM GETTING FIRE FROM ALL THE WIRES. I REPLACED THE SPARK PLUGS WITH THE ENGINE REPLACEMENT. I AM NOT GETTING A FAULT CODE FROM THE COMPUTER. I AM GETTING GAS WITH PRESSURE AT BLEED POINT BY INTAKE WITH NO AIR. I POURED A LITTLE GAS DOWN THE THROTTLE BODY TO SEE IF IF WOULD HIT, NOTHING. I SET THE TIMING BY PUTTING THE #1 PISTON AT TDC, PUTTING THE DISTRIBUTOR IN WITH THE ROTOR CAP POINTING AT #1, AND ENSURING THAT TIMING MARK IS AT NOTCHES ON TIMING COVER AT TDC. I HAVE EVEN SHOT THE TIMING LIGHT WHILE CRANKING AND IN #1 WIRE, I GET THE TIMING MARK RIGHT AT THE NOTCHES. I HAVE DOUBLE CHECKED ALL MY CONNECTIONS AND ALL SEEMS TO BE REATTACHED AS REMOVED. ANY HELP WOULD BE GREATLY APPRECIATED. MERRY CHRISTMAS.
AnswerHello Terry,
I'd say there is a good chance you have the distributor in 180 degrees off.
Unless you specifically checked the #1 cylinder to make sure it was on the compression stroke, you had a 50-50 chance of getting it right.
I bet you missed.
Pull the distributor out, and turn the rotor exactly 180 degrees.
Or, if you would rather verify it first, put the timing mark on TDC, with the rotor pointing toward #1 tower.
Then remove the #1 plug, and find a piece of hose....air hose, or fuel line hose, doesn't matter, as long as it fits tightly enough in the spark plug hole to seal, and blow on the hose with your mouth.
If you can blow air back through the cylinder, it means #1 is just finishing the exhaust stroke, and starting the intake stroke, and it is not time for spark there. it would be time for spark at the cylinder that is opposite #1 in the firing order.
Van
