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Forum: C4 ZR-1 Technical Postings 04-29-2018
Replies: 4
Views: 1,275
Posted By dondon
Re: Bose

Thanks for info.

Second attempt at a "hard reset" has not fixed it. Glad to know I'm not alone in these random "events".

I looked back at your prior post, you indicated that you also put in a...
Forum: C4 ZR-1 Technical Postings 04-25-2018
Replies: 4
Views: 1,275
Posted By dondon
Re: Bose

I'm somewhere in the middle of the process you are about to start. I had no sound and have not had sound since the car was purchased. Here are my observations so far.

My stereo had previously been...
Forum: C4 ZR-1 Technical Postings 03-13-2015
Replies: 11
Views: 3,468
Posted By dondon
Re: Engine Cut out after 3-5 seconds

So I thought I'd let the other members of this forum know that I am extremely stupid. By a series of coincidences, the above was diagnosed.

This is how my day started, I was very excited to have...
Forum: C4 ZR-1 Technical Postings 03-11-2015
Replies: 11
Views: 3,468
Posted By dondon
Re: Engine Cut out after 3-5 seconds

So AC Delco then? Any thoughts on what will have best reliability?
Forum: C4 ZR-1 Technical Postings 03-10-2015
Replies: 11
Views: 3,468
Posted By dondon
Re: Engine Cut out after 3-5 seconds

I think you are onto something. Just did a test, at 180 degrees F Coolant temperature, same problem came up. However this time I was in the safety of my garage - Happy days. I'm going to source some...
Forum: C4 ZR-1 Technical Postings 03-09-2015
Replies: 11
Views: 3,468
Posted By dondon
Re: Engine Cut out after 3-5 seconds

Thanks for the quick feedback. I haven't had a chance to do any troubleshooting, however I did start the car, and it was idling for about a minute before I turned it back off (manually). I'll have to...
Forum: C4 ZR-1 Technical Postings 03-09-2015
Replies: 11
Views: 3,468
Posted By dondon
Engine Cut out after 3-5 seconds

Hi

I've had my ZR1 parked for a bit (3-4 months)... decided today was a great day to make sure all it well. The short version of this ends with a tow and waiting on the road for 2.5 hours, here...
Forum: C4 ZR-1 Technical Postings 08-05-2014
Replies: 41
Views: 16,159
Posted By dondon
Re: LT5 fuel pump?

I used 2 performance electric p240kc pumps... Got the info from members of this site, they work well for my 90.
...
Forum: C4 ZR-1 Technical Postings 10-26-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

Today it lives. Took 5 months of very part time tinkering and it finally does everything that was expected of it.

So the problem appears to have been 2 fold. The fuel pumps, even though I could...
Forum: C4 ZR-1 Technical Postings 10-26-2013
Replies: 4
Views: 2,409
Posted By dondon
Re: Secondary Vacuum Pressure = 0 kPa/0.56V

Thanks Marc, was finally able to get things running well today. I must have a flimsy connection with the ECU and the third wire harness. Anyway, I was able to run your test and now have the pressure...
Forum: C4 ZR-1 Technical Postings 10-25-2013
Replies: 4
Views: 2,409
Posted By dondon
Re: Secondary Vacuum Pressure = 0 kPa/0.56V

Thanks for clarification. The sensor vacuum does not change any throttle position with full power on. I had a call with GK a short while back. He was of the opinion that the FP switch even though the...
Forum: C4 ZR-1 Technical Postings 10-25-2013
Replies: 4
Views: 2,409
Posted By dondon
Secondary Vacuum Pressure = 0 kPa/0.56V

I'm trying to figure out if the secondary vacuum sensor by the battery on my 90 should be reading different values under normal operating conditions.

At the moment, with the engine idling it...
Forum: C4 ZR-1 Technical Postings 10-21-2013
Replies: 7
Views: 2,962
Posted By dondon
Re: Reassembled Plenum to Motor - No Start - 0 RPM Cranking

I did initially, but while performing tests from the FSM, some of them required power so I did hook up the battery, then disconnected prior to reassembly.
Forum: C4 ZR-1 Technical Postings 10-20-2013
Replies: 7
Views: 2,962
Posted By dondon
Re: Reassembled Plenum to Motor - No Start - 0 RPM Cranking

Thanks to everyone for the help.

Today I took plenum off again. One pin looked a little fishy, I corrected as best I could. Reassembled... No Start.

I began to scour the net for information,...
Forum: C4 ZR-1 Technical Postings 10-13-2013
Replies: 7
Views: 2,962
Posted By dondon
Reassembled Plenum to Motor - No Start - 0 RPM Cranking

Hi

I think I've diagnosed a future ECM rebuild in my future, however I decided I wanted to put the plenum back on, make sure the car is running as it was before then send the ECM away.

Well...
Forum: C4 ZR-1 Technical Postings 09-30-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

The code 61 is an intermittent code 61. My apologies for not stating that correctly. I did receive a solid 61 when I tried to be smart and trick the computer but adding vacuum to the sensor and...
Forum: C4 ZR-1 Technical Postings 09-29-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

I think I'm out of ideas. Today I pulled the plenum... It was quite pleasurable. Anyway, I connected each vacuum pipe individually and tested for a blocked pipe, I tested the check valve. It all...
Forum: C4 ZR-1 Technical Postings 09-23-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

Happy Chart C-2D everyone. Following the instructions led me right to:
Faulty Hose or Blockage in hose or faulty check valve.

The pump pulls at 14HG is anyone is interested... so anyway, it...
Forum: C4 ZR-1 Technical Postings 09-22-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

Is this something I can do with plenum in place?

To be specific I'm trying to test :http://www.zr1netregistry.com/Portals/0/Images/TechArticle/vachoseasm.jpg

The check valve located to the...
Forum: C4 ZR-1 Technical Postings 09-22-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

I tried the


Surprise surprise - I was wrong :). So it immediately set a HARD Code 61, the ECM clearly is smart enough to know I was messing with it.

Anyway, I reset the code, hooked up the...
Forum: C4 ZR-1 Technical Postings 09-22-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

Hi Scott

Thanks for the info. FYI - car feels as though it starts quicker with new fuel pumps.

I've already run that test with success and it holds the actuators open as long as I want them to...
Forum: C4 ZR-1 Technical Postings 09-22-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

Thanks Franke, I went through the manual on these sections, and will go ahead an apply the FP test. If the rich exhaust comes back I'll run the other test. Thanks again for the input, and nice easy...
Forum: C4 ZR-1 Technical Postings 09-21-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

So the potential fuel pump problem has been resolved. I installed 2 P240KC fuel pumps (if you are fearful of doing this, don't be it was very very easy - I have no prior experience with this stuff -...
Forum: C4 ZR-1 Technical Postings 09-09-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

Thanks for the insight on how the pigtail is intended to function, I'm a newb at this.

I've ordered a fuel filter, in hindsight I should have just bought one from a local store and had instant...
Forum: C4 ZR-1 Technical Postings 09-08-2013
Replies: 55
Views: 21,382
Posted By dondon
Re: 90 - Running out of breath at 5000 - No Codes

Scott and Paul, thanks for the help. I've done some testing...

The good:
Bought a fuel pressure guage, hooked it up.
46 PSI when can is not on, 41 PSI when car has been started and was...
Showing results 1 to 25 of 32
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