1991 #614 back from grave but no start, cranks just fine
Hello Z family! So, as you all know, #614 has been in reassembly mode since November of 2022. So, this week we decided to try and get it running. After, tear down of PS header to replace and reposition gasket so that the manifold studs could be installed, various mystery leaks involving the V drain tube, repair and verify all secondary vacuum hoses, removal and cleaning of contacts in starter, replacing ignition coils (verified spark at all 8 plugs), verifying of fire order, removal and testing of alternator, replacement of spark plugs and fuel filter and new single pump from DL Merrill (now have 50-55psi at crank with 45 and eventually lower after crank) setting of TPS voltage, and 2 different PROM chips we are at this stage?. Cranks, does not run unless throttle pedal is lightly feathered, back fire out of headers and TB, smoke puffs out of TB during cranking. Any insight would be greatly appreciated. This car has been off the road since 2019 and was bought in pieces so to be here at this stage is simply a marvel.
HELP! We are at our knowledge base limit and do not know what else to do. Replacement of injectors will be our next step unless this is something silly we are missing. Thanks so very much! |
Re: 1991 #614 back from grave but no start, cranks just fine
I would double check and make sure spark plug wires are connected to correct coil terminal.
|
Re: 1991 #614 back from grave but no start, cranks just fine
Check fire order also
|
Re: 1991 #614 back from grave but no start, cranks just fine
Also if you have a different ecm try that, they junk
|
Re: 1991 #614 back from grave but no start, cranks just fine
Quote:
Yes, firing order was gone over many times during plenum install. I have the OE wires that are numbered. Made it easier. |
Re: 1991 #614 back from grave but no start, cranks just fine
Quote:
Thanks for the ideas! Chris |
Re: 1991 #614 back from grave but no start, cranks just fine
Quote:
|
Re: 1991 #614 back from grave but no start, cranks just fine
Chris, I have an ECM I can loan you. I may be down your way in the next week.
Sent from my iPhone using ZR-1 Net Registry |
Re: 1991 #614 back from grave but no start, cranks just fine
Quote:
Chris |
Re: 1991 #614 back from grave but no start, cranks just fine
If the Different ECM doesn't work bring it to me ill take it off your hands. haha
Anyway how disassembled was this car when you got it? Is there any chance there's a issue with camshaft timing? Injectors could really be an issue, I had a set of FICs on the shelf for a few years when I went to use them in my abandoned ZR-1 one of them decided to leak. like just a faucet of fuel dumping out of it, Of course I failed to double check them so I had to yank them out and test them and that's how I figured it out. with no input from the car other than fuel pressure. So perhaps you have a leaker or not even spraying. Of course the ECM could be the issue but I would have your injectors tested. If you want to send them to me I could do it see what they are doing before you buy new ones. |
All times are GMT -4. The time now is 03:53 AM. |
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright ZR-1 Net Registry 2020