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Old 08-03-2016   #7
Dynomite
 
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Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,817
Default Re: INJ1 Fuse Blowing

Quote:
Originally Posted by XfireZ51 View Post
Dyno,

Definitely an issue w the coil packs. That "injector fuse" feeds 10amps to the ignition coils. I know because that's what blew when I ran CnP on my motor a few years ago.
Yes.....from what Dave sent me it appears the INJ1 10 amp fuse feeds the coil packs.......but now what exactly am I looking for (what to measure to verify the issues)?

This issue started with the INJ1 fuse only blowing after the engine was warmed up for about 5-10 minutes. If I then (after engine is warmed up) replace the INJ1 fuse it blew immediately upon starting. Now the INJ1 blows with engine cold or warm and immediately upon trying to start the engine.

Also.....the INJ1 10 amp fuse does feed the Primary Injectors it appears and would also blow INJ1 if you pinched an Injector Wire or otherwise grounded an injector wire as others have done.

It appears the Plenum comes off (a 10 minute job) and then the coil packs...but again....what and where to measure?

Are you saying the coils themselves may be shorted out?

Anyway.....it also appears any pinched wire between the fuse block and coil packs/injectors could be involved (DIS and ECM may not be involved since neither would warm up within only 5-10 minutes)?

I think I can measure ohms backwards to INJ1 fuse (the hot wire) to verify if any path from the coil packs or Injectors is grounded which would indicate a short. But in this case I would not find any issues unless the components I am testing were warmed up.

I do not wish this issue on anyone who has driven the ZR1 some distance from home base.....
For me....I just got done with a 2,000 mile round trip to the Canadian Border to get a Customs report for the 95' ZR1 with NO issues as this issue happened a couple days after that trip backing the ZR1 approximately 100 feet from my garage, lift, and tools

I tested out (on the 2,000 mile road trip) ZFdoc rebuilt black label Transmission that I installed in my 95' along with new throw out bearing, new pilot bearing, and new U-Joints installed in the main drive shaft. Have to say......everyone should get a ZFdoc rebuild....those transmissions ARE THAT GOOD especially with the short throw Shifter.

Thanks guys...appreciate the information

Last edited by Dynomite; 08-04-2016 at 10:25 AM.
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