new engine wont start?
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 825
Likes: 40
From: Glasgow, Scotland
new engine wont start?
ive just finished placing a new 383 engine into my 78 vette, everything seems great, apart, no petrol coming into carb?
ive got plenty of fuel in tank, ive had to block of old fuel return line, new fuel pump doesnt have fuel return outlet
maybe some kind of air lock??
cheers
dave
ive got plenty of fuel in tank, ive had to block of old fuel return line, new fuel pump doesnt have fuel return outlet
maybe some kind of air lock??
cheers
dave
Drifting
Joined: Apr 2008
Posts: 1,305
Likes: 2
From: Lewisburg WV
thegazman
Check to see if gas is squirting into the carb when you pump the accelerator. To do this remove the air cleaner. Look inside the carb while rotating the accelerator mechanism on the carb. The accelerator pump should squirt gasoline into the carb. If you determine it has gasoline in carb; it could be a timing issue.
7th Gear
Joined: Dec 2007
Posts: 7
Likes: 0
From: Space Coast FL
I had the same problem with my 1980 when I replaced the motor with a 383 (de-stroked 400 in my case). It turned out my fuel pump had failed. Perhaps removing it after 28 years did it in. I don't know, but I bought a new fuel pump and it ran.
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 825
Likes: 40
From: Glasgow, Scotland
there is no fuel in carb atall,
it was a custom built engine, has already been run on a stand, I managed to get hold of my engine builder, I didnt prime the carb, all the fuel in the fuel line would be gone by now, car sat in garage without engine,for about 5 months, so I will try prime the carb 1st, then once its started fuel pump should start working at full stream.
it was a custom built engine, has already been run on a stand, I managed to get hold of my engine builder, I didnt prime the carb, all the fuel in the fuel line would be gone by now, car sat in garage without engine,for about 5 months, so I will try prime the carb 1st, then once its started fuel pump should start working at full stream.
Drifting
Joined: Oct 2005
Posts: 1,528
Likes: 148
From: East London/SW Essex UK
there is no fuel in carb atall,
it was a custom built engine, has already been run on a stand, I managed to get hold of my engine builder, I didnt prime the carb, all the fuel in the fuel line would be gone by now, car sat in garage without engine,for about 5 months, so I will try prime the carb 1st, then once its started fuel pump should start working at full stream.
it was a custom built engine, has already been run on a stand, I managed to get hold of my engine builder, I didnt prime the carb, all the fuel in the fuel line would be gone by now, car sat in garage without engine,for about 5 months, so I will try prime the carb 1st, then once its started fuel pump should start working at full stream.
Dave, did the engine builder run the engine on a test stand with an electric fuel pump (but not your mechanical pump) if so - was the pump push rod installed?You can check by removing the access bolt just below the pump housing!
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 825
Likes: 40
From: Glasgow, Scotland
thanks
dave
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Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 825
Likes: 40
From: Glasgow, Scotland
Drifting
Joined: Oct 2005
Posts: 1,528
Likes: 148
From: East London/SW Essex UK
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 825
Likes: 40
From: Glasgow, Scotland
update - put some fuel in the carb bowls, engine started, pump started pumping plenty of fuel, job done, but I have found another problem, a small oil leak!, I will start a new thread for that one
cheers
dave
cheers
dave
Drifting
Joined: Oct 2005
Posts: 1,528
Likes: 148
From: East London/SW Essex UK
Thread Starter
Burning Brakes
Joined: Apr 2008
Posts: 825
Likes: 40
From: Glasgow, Scotland
apart from a small oil leak, (which I hope is just the oil pan seal, and mot the rear main seal, all new seals!)
the engine is running great, revs crazy fast for a push rod engine, great sound, really pleased with it, not had it out for good spin yet, still trying to put everything back together!
thanks
dave
the engine is running great, revs crazy fast for a push rod engine, great sound, really pleased with it, not had it out for good spin yet, still trying to put everything back together!
thanks
dave