Engine power surges in sync with turn signals
CF Active Member
Joined: Jul 2015
Posts: 228
Likes: 9
I had a similar issue with a 98 k2500 diesel, but the blinkers would actually kill the engine. After weeks of investigating it myself and taking it to two mechanics, nobody had a clue.
I finally broke down and took it to a dealership. The service manager said, Oh yeah that's a ignition switch problem on those trucks. They swapped it out and I never had the issue again.
May just be a diesel thing but might be something to look into.
I finally broke down and took it to a dealership. The service manager said, Oh yeah that's a ignition switch problem on those trucks. They swapped it out and I never had the issue again.
May just be a diesel thing but might be something to look into.
Last edited by burnhedge; Aug 17, 2019 at 5:24 AM.
CF Beginner
Joined: Sep 2022
Posts: 2
Likes: 0
Resolution?!
1999 c 2500 engine 5.7L vortec . When I accelerate without the turn signal on it runs great. When I have turn signal on the engine looses power when blinker lights up and clears up looses power and clears up. I have a new fuel pump , battery , alternator. I’m stumped on what could be the issue? Any help would be appreciated
CF Senior Member
Joined: Nov 2014
Posts: 465
Likes: 93
If you can do this,
Measure the voltage at both the ign system and "AT" the fuel pump when the problem shows up.
That is the first half of the test. The other half is to verify clean complete ground connections for both. Remember , looking at them does NOTHING. They need to be removed , cleaned and reinstalled and if available a good dielectric grease applied to insure the air doesn't get at them.
As suggested in an earlier post, checking the ground connections from battery to all sheet metal should also be done. That may be how the fuel pump gets it's ground.
Measure the voltage at both the ign system and "AT" the fuel pump when the problem shows up.
That is the first half of the test. The other half is to verify clean complete ground connections for both. Remember , looking at them does NOTHING. They need to be removed , cleaned and reinstalled and if available a good dielectric grease applied to insure the air doesn't get at them.
As suggested in an earlier post, checking the ground connections from battery to all sheet metal should also be done. That may be how the fuel pump gets it's ground.
CF Beginner
Joined: Sep 2022
Posts: 2
Likes: 0
If you can do this,
Measure the voltage at both the ign system and "AT" the fuel pump when the problem shows up.
That is the first half of the test. The other half is to verify clean complete ground connections for both. Remember , looking at them does NOTHING. They need to be removed , cleaned and reinstalled and if available a good dielectric grease applied to insure the air doesn't get at them.
As suggested in an earlier post, checking the ground connections from battery to all sheet metal should also be done. That may be how the fuel pump gets it's ground.
Measure the voltage at both the ign system and "AT" the fuel pump when the problem shows up.
That is the first half of the test. The other half is to verify clean complete ground connections for both. Remember , looking at them does NOTHING. They need to be removed , cleaned and reinstalled and if available a good dielectric grease applied to insure the air doesn't get at them.
As suggested in an earlier post, checking the ground connections from battery to all sheet metal should also be done. That may be how the fuel pump gets it's ground.
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