02-24-2010 | #21 |
Join Date: Jul 2007
Location: Las Vegas
Posts: 298
|
Re: '91 missing and would like a second opinnion
But would that make the car have no power without turning on a service light?
The car runs like the secondaries aren't working, but I've confirmed that the actuators are indeed working. That's why I keep thinking fuel to the secondaires (or all of them not firing), or ignition timing. Mikko, I did notice last night that each time you fire the care, you get a knock. Maybe the knock sensor is getting flakey and retarding the timing? KT
__________________
1990 Grey/Black Too many for the sig. |
02-25-2010 | #22 |
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,680
|
Re: '91 missing and would like a second opinnion
If it's not fuel.
Can i ask what spark plugs are you using and where did you gap them/ Pete
__________________
'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
02-25-2010 | #23 |
Join Date: Dec 2005
Location: Las Vegas
Posts: 108
|
Re: '91 missing and would like a second opinnion
It has brand new stock Ac delco plugs which I believe had the correct gap right out of the box...
__________________
If you don't put the miles on it, someone else will... |
02-25-2010 | #24 |
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,680
|
Re: '91 missing and would like a second opinnion
I never seen a/c delcos gapped from the factory.
Can you take a couple out and check the gap,easy and free Pete
__________________
'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
02-28-2010 | #25 |
Join Date: Dec 2005
Location: Las Vegas
Posts: 108
|
Re: '91 missing and would like a second opinnion
If it is a failing O2 sensor would it be possible that it wouldn't show any codes for it?
__________________
If you don't put the miles on it, someone else will... |
02-28-2010 | #26 |
Join Date: Jan 2004
Location: Portland, OR
Posts: 1,057
|
Re: '91 missing and would like a second opinnion
Yes, at least to some degree. I've noticed a lot on these cars can go wrong without tripping a code.
__________________
Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
02-28-2010 | #27 | |
Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,376
|
Re: '91 missing and would like a second opinnion
Quote:
I had water get into the RH O2 connector on a trip from Houston to OKC. Engine was about to shake out of the Zee until I got it into open loop. Drove it the last 150 miles just into open loop & made it home fine.
__________________
Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
|
02-28-2010 | #28 |
Join Date: Dec 2005
Location: Las Vegas
Posts: 108
|
Re: '91 missing and would like a second opinnion
It definitely has a miss after 3200 rpm's. It must be a sensor of somekind. I think I just need to find connector to plug a computer to it...
__________________
If you don't put the miles on it, someone else will... |
02-28-2010 | #29 |
Join Date: Jan 2009
Location: Houston, Tx.
Posts: 59
|
Re: '91 missing and would like a second opinnion
In a regular situation on a common GM car, a knock sensor would be a logical choice after going through all the variables you exhausted.
I had such a problem a while back and traced it to a MAP sensor plug that looked and felt plugged in, but was not. It was so close it worked until the engines torque movement or rapid acceleration must have caused a disconnect on one terminal. From now on, I do not consider it connected until you hear a loud click when connecting it. It is a pain, but disconnecting & reconnecting all the terminals you can get too might pay off and make sure your grounds are in good shape. I plan on adding a few in the future just for grins.
__________________
An Unarmed Citizen is a Future Peasant. Something BLOWbama & Hilary are trying to accomplish now at the UN with the "Global Small Arms Treaty" |
02-28-2010 | #30 | |
Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,376
|
Re: '91 missing and would like a second opinnion
Quote:
As for the knock sensor, a bad sensor or lead will give you a SES light and prevent secondary operation. I haven't read the whole thread, have you pulled codes, cleared and restablished codes?
__________________
Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
|
|
|