Question about 1999 GMC Sierra

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Will turn over but not start have replaced plugs wires dist.cap rotor ignition module

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Hello, you might want to check coil in top of dist, usually when ign module goes out, the motor will run untill it gets hot. sometimes the engine will crank, and run fine, then as module heats up, it starts breaking down, will not fire. also check coil wire, make sure it is good, even if it is new, lots of chevrolet parts made in mexico,not very good quality. also, have somebody, check and see if your wire you plug in dist for power is working .

Posted on Feb 06, 2010

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Do you have spark??? if so, check fuel pressure, these trucks must have 60 psi to run, 50 psi will not work,.

Posted on Feb 06, 2010

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Engine won't start. Getting no spark.


Have you check to see if the timing on the car is right?

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1985 Chevy El Camino 305ci. Turned over good but wouldn't fire. Replaced contrrol module and it started fine for about 2 months, then did the same thing. Replaced dist cap, rotor & coil. Start


Had an 84 silverado 305 that did the same thing. Try giving it a full tune up. Plugs, wires... Mine turned out to be fouled plugs. I didn't find that out till after i tore it down & put a timing set in it. Wasn't getting good enough spark.

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The Honda system uses a coil that mounts inside the dist, right ?
If you can check voltage output at the coil tower with the cap off you can find out if the coil is firing. If it is, then yes the rotor could be the problem. The voltage has to go thru the cap to the center of the rotor then to each plug terminal. The spark can jump thru the rotor and ground thru the dist shaft.

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Will turn over without fire, replaced brain and the ignition coil


bet on the module,if it's tfi it's on the side of the dist.85 could be either way,may be the older fender mounted module.
If it's dist. mounted Ford recomends replacing the pick up coil also. There is a wire with a plug on the tfi's ,you remove the "cap" to set the timing,just 2 wires with a gray cap on the end.Maybe that's the wire you mentioned.

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Truck wont crank. we have put new distributor cap, rotor button, coil pack, plugs, wires, and fuel pump. we also checked our firing order.


you said you repl dist cap that means you don't have a crank sensor you have electronic ing module. remove your elec ing module have it tested most auto parts stores could test your module, or check your coil at the neg terminal. should have power. if not you lost your primary volt from your batt.your secondary power is coming from your electronic ing module from the module to the pos terminal on the coil, when the eng cranks,from the coil to the dist cap , from the dist cap center to the rotor then out to the plugs,this all happen pervided the timing belt or timing chain is ok. the cumbustion chainber needs 3 things , thats fuel, air, and spark.

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1 Answer

Will not start no fire a plugs 1994 sub 350


Check the distributor ignition module in the distributor. Also check to see if you have power going into the distributor. If you do, It's a safe bet that the distributor is bad. Check the cap and rotor if they haven't been changed in awhile. Order of cheapest to most expensive is actually. Power into dist. Cap and rotor, then Dist/module.

Mar 14, 2010 | 1994 Chevrolet Suburban

1 Answer

1990 K5 Blazer DIED(Electrical?)?


There may be no injector pulse if the computor does not see a RPM signal.
There will be no spark if the ignition module does not see a dist pulse from the dist pickup.......a RPM signal.
Because you do not have both ......I would suggest to check/change the dist pick up.
Follow the wires from the ignition module inside the dist to the pickup which is also inside the dist.
If it is just a bad dist pickup....keep all your old parts as good spares.
Also...is the dist turning? to provide a RPM signal?
You will have to remove the dist to change the pick-up.....mark your timing locations......"rotor position" and "dist body location"before removal.
A quick test before installing the "repaired dist" .....plug it in the the truck wiring and turn on the key....DO NOT CRANK THE ENGINE OR YOU WILL LOSE YOUR DIST ROTOR CORRECT POSITION......as you spin the dist by hand .....the injectors should spray.

Aug 23, 2009 | 1989 Chevrolet S-10 Blazer

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