Built engine, no start! need 99+ wiring swap help
Thread Starter
Joined: Jul 2008
Posts: 233
Likes: 0
From: Escaped Chiraq to the Sticks
Built engine, no start! need 99+ wiring swap help How's It Going, I Had A Custom Engine Built For My 98 TA, And Have A basic Tune From Speed Inc,42# Injectors Aeromotive Pump, Custom Everything. It Has The Essentials, Fuel Spark And Air, It Started For About 4 Seconds And Now Nothing, It Sounds Like It Wants Too But Won't, Any Help Much Appreciated. I Need To Get This Done By Tuesday For The Dyno Tune
Last edited by Firehawk896; Nov 20, 2013 at 01:23 PM.
Thread Starter
Joined: Jul 2008
Posts: 233
Likes: 0
From: Escaped Chiraq to the Sticks
Brought it to a local speed shop and the tested it I would attach an image but my tablet won't let me
I also just swapped my harness, ( I have a 98) to am 01 pcm and engine harness, I can't find any threads on here that are write ups to change the connectors under the pass side for the gauges, so if anyone has a link to that or adapter harness it would be much appreciated.
Also I put the stick injectors back in and the car fired right up, I have to get a coffee reader to see why theres a misfire though
I also just swapped my harness, ( I have a 98) to am 01 pcm and engine harness, I can't find any threads on here that are write ups to change the connectors under the pass side for the gauges, so if anyone has a link to that or adapter harness it would be much appreciated.
Also I put the stick injectors back in and the car fired right up, I have to get a coffee reader to see why theres a misfire though
Last edited by Firehawk896; Nov 20, 2013 at 01:21 PM.
Wow! Another one. LOL
If you insist on the '01 PCM (can't imagine why you would) you need to use your original harness, and simply swap the pins/wires around in the PCM connectors for the '01 PCM. Should not have changed the harness. With what you have there, there is no valid reason to not use the '98 PCM. I have had several nine second customers using their original '98 PCMs.
If you insist on the '01 PCM (can't imagine why you would) you need to use your original harness, and simply swap the pins/wires around in the PCM connectors for the '01 PCM. Should not have changed the harness. With what you have there, there is no valid reason to not use the '98 PCM. I have had several nine second customers using their original '98 PCMs.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo If it has spark at the plugs, try spraying starting fluid or carb cleaner in the air box. If you have a good scanner, scan it and look for cranking RPM, make sure %TPS isn't high, and that the indicated coolant temp agrees with ambient.
Should be within ten degrees or so. If the temp shows very cold it will try to flood the engine. Spraying something in it won't make it try to start if that is the case. Reading a lot warmer than ambient would like being sprayed.
No cranking RPM (a good scan tool will have this) would likely indicate a crank position sensor circuit or sensor issue.
TPS above 95% shuts the injectors off, aka Clear Flood Mode.
Check all PCM grounds. (engine cranking) Back probe them at the PCM with a digital volt/ohm meter. Should show less than 1/2 volt. Voltage indicates a bad ground.
Good luck.
Should be within ten degrees or so. If the temp shows very cold it will try to flood the engine. Spraying something in it won't make it try to start if that is the case. Reading a lot warmer than ambient would like being sprayed.
No cranking RPM (a good scan tool will have this) would likely indicate a crank position sensor circuit or sensor issue.
TPS above 95% shuts the injectors off, aka Clear Flood Mode.
Check all PCM grounds. (engine cranking) Back probe them at the PCM with a digital volt/ohm meter. Should show less than 1/2 volt. Voltage indicates a bad ground.
Good luck.
Last edited by Ed Wright; Nov 26, 2013 at 08:28 PM. Reason: Can't type for shit....
Yes, a scanner will work even if the engine won't start. They are used all the time to help diagnose why one won't start. Turn the key on and you should see all the parameters. Now, if you have a code reader, instead of a real scanner, it won't tell you much. I would not waste my money on a code reader.