Help, Wont start after rebuilt.
Thread Starter
Cruising
Joined: Jun 2001
Posts: 12
Likes: 0
From: League city, Tx.
Help, Wont start after rebuilt.
I have an 87 with a L98, I rebuilt the motor and have re-installed it.
I can spray some starting fluid into it and it engine runs till the fumes are gone.
Fuel pump runs with the key on, then stops after 2 seconds. I have a FP gauge and it reads 42 psi. I dont think the injectors are firing.
Help please, give me some ideals.
I can spray some starting fluid into it and it engine runs till the fumes are gone.
Fuel pump runs with the key on, then stops after 2 seconds. I have a FP gauge and it reads 42 psi. I dont think the injectors are firing.
Help please, give me some ideals.
Drifting
Joined: Mar 2005
Posts: 1,923
Likes: 0
From: GA
Check the injector fuses; inj 1 & inj 2. then..
The ECM must see a refrence pulse from the distributor before it will fire the injectors. If the fuses are good find the break in the wire from the ignition module to the ECM, if that is good then replace the module.
The ECM must see a refrence pulse from the distributor before it will fire the injectors. If the fuses are good find the break in the wire from the ignition module to the ECM, if that is good then replace the module.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Bluevette85
Could the distributor be 180deg off?
Because it wouldn't run, temporally, off of the starting fluid, if it were. Where does some of this stuff come from???
RACE ON!!!
Safety Car
Joined: Sep 2003
Posts: 3,599
Likes: 24
From: Orange County NY
St. Jude Donor '10-'11-'12-'13
the injectors may not be firing. one way to check for power to the injectors is with an injector harness tester (got mine from Snap On). you plug it into any of the injector harness sockets and crank the engine. if the light flashes on and off, you know that you have power to the injectors. if not, then it's time to start looking at why the ECM isn't firing them.
in my case a few years ago, i had my injectors cleaned and flow tested at Lingenfelter. i re-installed them, but the car wouldn't start up. after a lot of troubleshooting, it turned out they "froze up".
installed a new set of Accels and it fired right up.
in my case a few years ago, i had my injectors cleaned and flow tested at Lingenfelter. i re-installed them, but the car wouldn't start up. after a lot of troubleshooting, it turned out they "froze up".
installed a new set of Accels and it fired right up.
Team Owner
Joined: Jan 2003
Posts: 20,318
Likes: 248
From: Summerland B.C. Canada
This is from my 86 manual but should help you diagnose.
http://members.shaw.ca/corvette86/En...ButWontRun.pdf
http://members.shaw.ca/corvette86/En...agram%2086.pdf
http://members.shaw.ca/corvette86/Fu...l%20System.pdf
http://members.shaw.ca/corvette86/En...ButWontRun.pdf
http://members.shaw.ca/corvette86/En...agram%2086.pdf
http://members.shaw.ca/corvette86/Fu...l%20System.pdf
Thread Starter
Cruising
Joined: Jun 2001
Posts: 12
Likes: 0
From: League city, Tx.
Thank You for the info.......I hooked up a test light to one of the injectors, and it's on steady while cranking the motor. Not blinking as per the manual. Never changed a ECM, is it difficult???
Do injectors freeze from setting for a couple months????
Do injectors freeze from setting for a couple months????
Team Owner
Joined: Jan 2003
Posts: 20,318
Likes: 248
From: Summerland B.C. Canada
Originally Posted by Moonpie 87
Thank You for the info.......I hooked up a test light to one of the injectors, and it's on steady while cranking the motor. Not blinking as per the manual. Never changed a ECM, is it difficult???
Do injectors freeze from setting for a couple months????
Do injectors freeze from setting for a couple months????
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
Safety Car
Joined: Sep 2003
Posts: 3,599
Likes: 24
From: Orange County NY
St. Jude Donor '10-'11-'12-'13
Originally Posted by Moonpie 87
Thank You for the info.......I hooked up a test light to one of the injectors, and it's on steady while cranking the motor. Not blinking as per the manual. Never changed a ECM, is it difficult???
Do injectors freeze from setting for a couple months????
Do injectors freeze from setting for a couple months????
injectors will not typically freeze from sitting (if they were working previously), but one of the techs at Lingenfelter did confirm that he's had older injectors on the flow machine work fine, only to NOT work once installed in the customer's car (as was the case with me).
Agent 86 is right on - you'll need to hook up the test light leads to both wires in the injector harness to see if it blinks.
let us know how you make out...
dan
