Nooot sure what it could be....replaced spark plugs, plug wires,cap,and coil...?what do i do now..could it be a vacum leak?
This culprit can be a bad cam sensor, bad fuel filter, or weak fuel pump, or fuel pressure regulator valve. Or simply a clogged misfiring or just bad injector. By testing your fuel pressure first and seeing if after a while the fuel pressure has not dropped in the fuel rail test for say 30 mins. If the pressure stays up that test eliminates the fuel rail pressure regulator. If the pressure coming in is weak all together your filter or pump is bad. If the RPM gauge does not move when this happens it is the crank sensor. If when cold it runs fine and starts running worse after warming up check the cam sensor. There you go need any help ask for me.please rate my solution it is how i earn my achievements. Thanks in advance.
SOURCE: 2000 GMC Sierra 4.3L no spark at the plugs...HELP!
no codes. most direct components changed.
computer. take it out or have the truck towed to the shop/dealer to test the computer.
SOURCE: GMC JIMMY NO START BUT GOT SPARK AND FUEL
try the oil pressure switch, that was a common problem on Gm trucks when I used to work on them, the oils switch was bad and woulden't allow it to start and the ones I worked on were on the back of the distributor.
SOURCE: OK 1997 gmc sierra 5.7liter 4x4 replaced coil and
Doesnt this engine use a crank position sensor? mounted on timing chain cover.I would check that first
SOURCE: 1991 4.3L GMC Jimmy S-15 will not start. Turns
You need 3 things.
Compression
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 13-13.5 lbs on your TBI
If you have all 3 then move on to injector pulse to both injectors.
Keep me posted and recheck your spark plug wire to make sure they are not crossed. firing order 1-2-3-4-5-6 cylinder # passenger side 1-3-5 front to back. cylinder # drivers side 2-4-6 front to back
distributor #1 is located at the 7 o"clock and rotates clock wise so next distributor post on the right working clock wise is #2. Good luck and hope this helps.
SOURCE: 94 gmc sonoma 4.3l vortec new coil, plugs, wires
The ignition module in the distributor is what you need to give the engine spark to the plugs. It senses signals from the PCM to regulate the spark control and this item is the part that took over the old style point & condensor type ignitions. It is time for a new one in your truck
315 views
Usually answered in minutes!
×