89 won't run
Thread Starter
Burning Brakes
Joined: Dec 2012
Posts: 788
Likes: 160
From: Rio Rico, AZ
Geeze no, buying parts does not make me feel good. Except those parts be headers, cam and the like. I also like buying a new gun, tools and parts for my bench top CNC machine build and vintage stereo stuff. It's just the O2 sensor now has come up a couple times. They are cheap. I just asked "How would a defective O2 sensor cause the problem I'm seeing?" If I understood what part the O2 sensor played here maybe it would be worth the changing it.
Supporting Vendor
Joined: Oct 2004
Posts: 761
Likes: 68
I'd love if ARBEE step in here and either help me or condemn me !!!!!!!
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Just checked the 1988 - same ! My scanner is not connected to this new PC. I only ask you look - I am not that stupid ! I would be happy to call you and explain to you if you give me your phone number ~!!! My email is: greg@blowerworks.net
I'd love if ARBEE step in here and either help me or condemn me !!!!!!!
I'd love if ARBEE step in here and either help me or condemn me !!!!!!!
I will too, if you continue with the idea that the wrong answer, is actually the right answer.
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
Geeze no, buying parts does not make me feel good. Except those parts be headers, cam and the like. I also like buying a new gun, tools and parts for my bench top CNC machine build and vintage stereo stuff. It's just the O2 sensor now has come up a couple times. They are cheap. I just asked "How would a defective O2 sensor cause the problem I'm seeing?" If I understood what part the O2 sensor played here maybe it would be worth the changing it.
Supporting Vendor
Joined: Oct 2004
Posts: 761
Likes: 68
When you start up the engine it is in open loop. IOW, the ECM doesn't care about your O2 sensor since it isn't going to be working till it gets hot enough anyways. There are certain conditions. Coolant temp and it has to have run for a certain amount of time with no issues that the ECM will go into closed loop and take feedback from the O2 sensor. Outside of that, it doesn't care. It goes off certain tables and assumes everything in the table is right.
What "you" say about what runs the factory fuel pump is so FALSE - please read the factory manual !!! If you pulled the oil switch connector and your car continued to run - well ??? Bad relay ????
I ask ANY of the hundreds who read these threads to pull their connector to the oil pressure switch and TEST. I bet you car will start and then STALL ! After this I give up on FAKE NEWS ! lol
Last edited by BlowerWorks; Feb 4, 2018 at 11:50 AM.
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Digression on o2 sensors.
Geeze no, buying parts does not make me feel good. Except those parts be headers, cam and the like. I also like buying a new gun, tools and parts for my bench top CNC machine build and vintage stereo stuff. It's just the O2 sensor now has come up a couple times. They are cheap. I just asked "How would a defective O2 sensor cause the problem I'm seeing?" If I understood what part the O2 sensor played here maybe it would be worth the changing it.
So the purpose of the o2 is to measure the oxygen content of the exhaust gas. A high level of oxygen left over from the combustion process, means there is insufficient fuel in the air/fuel mixture. A low level of oxygen means there is an excessive amount of fuel in the air/fuel mixture.
As a side note. This is the concept that causes nitrous oxide + additional fuel to make so much more power. Nitrous oxide breaks down at combustion temps releasing more oxygen than there would otherwise be. The additional oxygen allows more fuel to burn than what otherwise would. Burning more fuel (in the same amount of time) results in more power.
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
OMG - I cannot believe you all ! Put your thinking cap on ........ why does the L98 start and then stall if what you say is so ?????? NO - please - I have been looking at the L98 for 30+ years and I PROMISE you what I say is true !!! It's so simple if you look at the FSM. What more can I say ? I asked ARBEE to chime in BECAUSE this is his cause: FALSE INFO !!!
What "you" say about what runs the factory fuel pump is so FALSE - please read the factory manual !!! If you pulled the oil switch connector and your car continued to run - well ??? Bad relay ????
I ask ANY of the hundreds who read these threads to pull their connector to the oil pressure switch and TEST. I bet you car will start and then STALL ! After this I give up on FAKE NEWS ! lol
What "you" say about what runs the factory fuel pump is so FALSE - please read the factory manual !!! If you pulled the oil switch connector and your car continued to run - well ??? Bad relay ????
I ask ANY of the hundreds who read these threads to pull their connector to the oil pressure switch and TEST. I bet you car will start and then STALL ! After this I give up on FAKE NEWS ! lol
Supporting Vendor
Joined: Oct 2004
Posts: 761
Likes: 68
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Thread Starter
Burning Brakes
Joined: Dec 2012
Posts: 788
Likes: 160
From: Rio Rico, AZ
I didn't mean for all this argument to happen. I was mainly just venting. You know, everything seeming to happen all at once? Well hoping too for something quick and simple that would fix it. 
How often does that happen though? I'll just take my Vette to the shop.
How often does that happen though? I'll just take my Vette to the shop.
Supporting Vendor
Joined: Oct 2004
Posts: 761
Likes: 68
It's simple: if engine starts on CRANK and then stalls - replace Engine Oil Sensor and report back !!!!!! OMG I just cannot believe all the "FALSE INFO" here . There must be other mechanics that read this and will confirm what I say ????? Just read tghe "f...cking" FSM !!!!!! greg
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
No one ever does. Don't let it bother you. Instead, think of it as debate ....
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
It's simple: if engine starts on CRANK and then stalls - replace Engine Oil Sensor and report back !!!!!! OMG I just cannot believe all the "FALSE INFO" here . There must be other mechanics that read this and will confirm what I say ????? Just read tghe "f...cking" FSM !!!!!! greg
Drifting
Joined: Feb 2006
Posts: 1,423
Likes: 96
From: Magnolia Tx
OMG - I cannot believe you all ! Put your thinking cap on ........ why does the L98 start and then stall if what you say is so ?????? NO - please - I have been looking at the L98 for 30+ years and I PROMISE you what I say is true !!! It's so simple if you look at the FSM. What more can I say ? I asked ARBEE to chime in BECAUSE this is his cause: FALSE INFO !!!
What "you" say about what runs the factory fuel pump is so FALSE - please read the factory manual !!! If you pulled the oil switch connector and your car continued to run - well ??? Bad relay ????
I ask ANY of the hundreds who read these threads to pull their connector to the oil pressure switch and TEST. I bet you car will start and then STALL ! After this I give up on FAKE NEWS ! lol
What "you" say about what runs the factory fuel pump is so FALSE - please read the factory manual !!! If you pulled the oil switch connector and your car continued to run - well ??? Bad relay ????
I ask ANY of the hundreds who read these threads to pull their connector to the oil pressure switch and TEST. I bet you car will start and then STALL ! After this I give up on FAKE NEWS ! lol
You WILL lose this bet. I know and can read a schematic. The relay and the oil switch are in PARALLEL so either one will run the fuel pump. The relay is pulled in by the ECM if the distributor is turning . Nope, won’t stall.
Supporting Vendor
Joined: Oct 2004
Posts: 761
Likes: 68
OMG - I repeat "only in crank mode" - yes in parallel but READ - only in crank ! After this I declare all of you who believe "them" IDIOTS ! lol
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Drifting
Joined: Feb 2006
Posts: 1,423
Likes: 96
From: Magnolia Tx
This is what you posted. It is not right. The ECM will run the fuel pump as long as the distributor is turning. Low oil pressure cut-out on TPI cars is a MYTH. Stop perpetuating bad information.
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
Before we go there, has anyone ascertained that the wiring is the same in all years of the C4?
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI