Not running too good
Thread Starter
1st Gear
Joined: Jun 2018
Posts: 1
Likes: 0
Not running too good
I have a 94 Vette. Just had a new LT1 engine put in car about a month ago. Everything went well with the engine, but now the car will not run worth a darn. Cranks fine, and idles well; car will not accelerate at all. The engine will come up to speed but only after a slow rate, and also the spark knock sensors go off. (It has new sensors) All new accessories( plugs, wires, distributor etc..) Do I just need to take to a shop that can put it on the PC to figure out the tune up? Or something that a “shade tree” like myself can do?
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
I have a 94 Vette. Just had a new LT1 engine put in car about a month ago. Everything went well with the engine, but now the car will not run worth a darn. Cranks fine, and idles well; car will not accelerate at all. The engine will come up to speed but only after a slow rate, and also the spark knock sensors go off. (It has new sensors) All new accessories( plugs, wires, distributor etc..) Do I just need to take to a shop that can put it on the PC to figure out the tune up? Or something that a “shade tree” like myself can do?
Drifting
Joined: Nov 2015
Posts: 1,333
Likes: 397
From: Clay New York
When you say "new" do you mean a factory crate motor or "new" as in I bought it from someplace/someone and had it put sale. Almost every used Chevy engine I've ever seen for sale was a "vette engine".
Le Mans Master
Joined: Oct 2004
Posts: 6,314
Likes: 508
From: South-central Missouri
Get an FSM. Then, look for the classics:FUEL AIR SPARK
If it starts/runs, then you can put spark on the back burner. Fuel pressure at the rail for an LT1/4 motor should be 40-42 psi (very narrow range on the C4 LTx motors).
