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Search took 0.01 seconds. Search: Posts Made By: DPZR1
Forum: C4 ZR-1 General Postings 07-28-2014
Replies: 4
Views: 658
Posted By DPZR1
Wires to drivers footwell light 1990 ZR1

I know how this is going to sound.... But I took off the cover under the steering column and for the life of me cannot find the wire that plugs back into the footwell light. I have been upside down...
Forum: C4 ZR-1 Technical Postings 07-28-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Re: Engine limited to 5000 rpm 1990 ZR1 LT5

Problem solved!!!

Thank you everyone!!

I put new actuators in and tested them!! But under hard acceleration one of the actuators wasn't holding vacuum, so I replaced everything in the...
Forum: C4 ZR-1 Technical Postings 07-10-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Re: Engine limited to 5000 rpm 1990 ZR1 LT5

What vacuum pressure should the 1990 ZR1 pull? What should the gauge read if the pump is working properly?
Forum: C4 ZR-1 Technical Postings 07-10-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Re: Engine limited to 5000 rpm 1990 ZR1 LT5

Here's a thought and question. In that the vacuum pressure drops to zero instantly, doesn't that mean there has to be an electronic dump valve of some sort?

What in the ZR1 system could release...
Forum: C4 ZR-1 Technical Postings 07-09-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Re: Engine limited to 5000 rpm 1990 ZR1 LT5

Will check in the morning and reply.
Forum: C4 ZR-1 Technical Postings 07-09-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Re: Engine limited to 5000 rpm 1990 ZR1 LT5

Talked with mechanic and I am going to check vacuum from the vacuum pump side tomorrow. He mentioned though that if the reserve was not catching up with demand that the vacuum would drop slowly,...
Forum: C4 ZR-1 Technical Postings 07-09-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Re: Engine limited to 5000 rpm 1990 ZR1 LT5

Good thought and possibility! Thank you!
Forum: C4 ZR-1 Technical Postings 07-09-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Re: Engine limited to 5000 rpm 1990 ZR1 LT5

Everything I have been told is that their are two O2 sensors on the 1990 ZR1 LT5. Is this correct?
Forum: C4 ZR-1 Technical Postings 07-09-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Re: Engine limited to 5000 rpm 1990 ZR1 LT5

I wondered if it was something to do with an O2 sensor but wouldn't you get an O2 sensor code?
Forum: C4 ZR-1 Technical Postings 07-09-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Re: Engine limited to 5000 rpm 1990 ZR1 LT5

All the work was done recently. A friend of mine is a 3rd generation mechanic and a genius. Literally!! We, mostly him did the work. The vacuum is holding through 1st and 2nd gear and it pulls all...
Forum: C4 ZR-1 Technical Postings 07-09-2014
Replies: 20
Views: 7,440
Posted By DPZR1
Engine limited to 5000 rpm 1990 ZR1 LT5

Replaced parts:Fuel pump -From Jerry's
Fuel injectors - From FIC
Secondary fuel pump relay - From Chevrolet
1 butterfly port actuary valve - from Chevrolet
Both O2 sensors - from Chevrolet

...
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