No spark on 91 4.3 Blazer
DanaGirl
08-18-2006, 11:23 PM
I have a 1991 S10 Blazer 4WD w/4.3 V6 Man 5 speed trans 200,000+ miles.
The truck ran fine Monday, came home and went to start it Thursday and it will not start. There is no spark at all. I have put in a new(remanufactured from Delco)ECM and new electronic module in the distributer a new coil, cap, rotor and coil to distributer wire. I have checked the Sending unit coil in the distributer with an ohm meter and get a infinit reading. I have traced the 4 wire plug from the distributer to the ECM and have contineuity on all 4(yea I don't spell well) I have shot some starting fluid into the motor and still no luck, I didn't think it would help as I have checked it with a spark tester on more than one plug wire and the coil wire and see no spark. I don't know what else to change out. The only thing that is the same is that trigger coil thing on the distributer shaft and I beleave it checks out ok. I hear the fuel pump run for a few sec when I turn the key on and before I changed out the ECM the only code it gave was the code 12 and thats all I get with the new ECM also. I also had the electronic module checked and the new and old one work as they should. Any one have a clue as to what else could cause a no spark situation? I'm stumped. Thanks for reading and any help you can offer. Added edit: I have also checked all fuse's and there all good, unless there's some that are not in the fuse box on the drivers side under dash. Just FYI. Thanks again.
The truck ran fine Monday, came home and went to start it Thursday and it will not start. There is no spark at all. I have put in a new(remanufactured from Delco)ECM and new electronic module in the distributer a new coil, cap, rotor and coil to distributer wire. I have checked the Sending unit coil in the distributer with an ohm meter and get a infinit reading. I have traced the 4 wire plug from the distributer to the ECM and have contineuity on all 4(yea I don't spell well) I have shot some starting fluid into the motor and still no luck, I didn't think it would help as I have checked it with a spark tester on more than one plug wire and the coil wire and see no spark. I don't know what else to change out. The only thing that is the same is that trigger coil thing on the distributer shaft and I beleave it checks out ok. I hear the fuel pump run for a few sec when I turn the key on and before I changed out the ECM the only code it gave was the code 12 and thats all I get with the new ECM also. I also had the electronic module checked and the new and old one work as they should. Any one have a clue as to what else could cause a no spark situation? I'm stumped. Thanks for reading and any help you can offer. Added edit: I have also checked all fuse's and there all good, unless there's some that are not in the fuse box on the drivers side under dash. Just FYI. Thanks again.
rlith
08-19-2006, 08:13 AM
At this point, the only thing it really could be is a bad distributor itself..
Mr. Rivera
02-02-2007, 12:22 AM
Pick-up coil in the distributor, they tend to get weak.
rlith
02-02-2007, 05:18 AM
Pick-up coil in the distributor, they tend to get weak.
Please don't ressurect 7 month old threads... Thankyou :nono:
Please don't ressurect 7 month old threads... Thankyou :nono:
tec5120
02-06-2007, 08:47 PM
take off the cap does the rotor turn? if not, the gear is shot.if it turns you need a new pick up mod .remove the dist drive out roll pin in gear slide the shaft from the houseng and replace.make sure you mark the rotor position before you remove the dist so you dont screw up your timing .............
ZL1power69
02-09-2007, 09:12 PM
as rilth said, posting in old threads is a :nono: . thread closed.
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