LSA Swap - No Start
Thread Starter
TECH Regular
Joined: Dec 2005
Posts: 439
Likes: 26
From: IA
LSA Swap - No Start I deleted my previous thread as alot has changed. My tuner sent me a new E67 ECU along w a new tune for my LSA swap into my 1972 Chevelle. Originally I had no spark or fuel but his new tune has fixed that issue. Now the issue is there is no injector pulse. Fuel pump runs/primes, I have spark but the engine just just doesn't fire. I have cranking RPMs showing up. I've attached my current tune along with the VCM scanner whilte trying to start the car. I'm stumped.
Last edited by korndawg; Nov 3, 2020 at 12:53 PM.
Teching In
Joined: Nov 2018
Posts: 17
Likes: 2
For what it is worth when I installed my L83 and 6l80E in my 63 Pontiac I had similar problems. I do not remember who I used for the first engine loom but they were no help in solving the problem. With the help of my credit card company I sent the whole package back for a refund. Purchased a Howell loom and had them do a bench tune on the ECM. Plugged everything in, turned the key and presto. It has been running for a year now and I am looking for someone to do a "tweak and peak" on the ECM for a couple of glitches, but would not be scared to fill the tank and head for the east coast just the way it sits.
Thread Starter
TECH Regular
Joined: Dec 2005
Posts: 439
Likes: 26
From: IA
For what it is worth when I installed my L83 and 6l80E in my 63 Pontiac I had similar problems. I do not remember who I used for the first engine loom but they were no help in solving the problem. With the help of my credit card company I sent the whole package back for a refund. Purchased a Howell loom and had them do a bench tune on the ECM. Plugged everything in, turned the key and presto. It has been running for a year now and I am looking for someone to do a "tweak and peak" on the ECM for a couple of glitches, but would not be scared to fill the tank and head for the east coast just the way it sits.
Teching In
Joined: Nov 2018
Posts: 17
Likes: 2
I believe that my issue was the sensors in the front of the engine. Not familiar enough with the system to know what they are but there are three of them essentially in front of the camshaft. My original loom had a wrong connector to one of them and I had to build a jumper because the supplier kept promising but not delivering. The Howell loom plugged right in and I connected the 5 or 6 wires that needed to be tied into the original loom and it fired first time. The only problem I have had since was the frame mounted high pressure pump. Ordered a Walboro and they delivered a Chinese knock off which died within abut 5,000 mi.
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