Issues after 383 build
Thread Starter
Launching!
Joined: Aug 2004
Posts: 284
Likes: 0
From: British Columbia, Canada
Issues after 383 build So car was put back together and is running, I have about 50 miles on her. Couple issues.
My Service Engine Soon light is now on, code scan showed banks 1 and 2 lean. Codes were cleared and came back on again. Vacuum leak??? Fuel?
Also, starting the engine takes excessive cranking. Gotta crank it for about 5 seconds before it fires up.
What do you think is wrong here? Any ideas?
I have a new pump/harness and injectors. Tune is a mail order from Texas Speed.
My Service Engine Soon light is now on, code scan showed banks 1 and 2 lean. Codes were cleared and came back on again. Vacuum leak??? Fuel?
Also, starting the engine takes excessive cranking. Gotta crank it for about 5 seconds before it fires up.
What do you think is wrong here? Any ideas?
I have a new pump/harness and injectors. Tune is a mail order from Texas Speed.
Thread Starter
Launching!
Joined: Aug 2004
Posts: 284
Likes: 0
From: British Columbia, Canada
Yes, Texas Speed had all my specs as they were the ones I got all my stuff from. Update, car was at the shop and checked for vacuum leaks, nothing located. I think I am just going to take the car for a local dyno tune.
TECH Regular
Joined: Jun 2012
Posts: 414
Likes: 5
From: SV, AZ
So car was put back together and is running, I have about 50 miles on her. Couple issues.
My Service Engine Soon light is now on, code scan showed banks 1 and 2 lean. Codes were cleared and came back on again. Vacuum leak??? Fuel?
Also, starting the engine takes excessive cranking. Gotta crank it for about 5 seconds before it fires up.
What do you think is wrong here? Any ideas?
I have a new pump/harness and injectors. Tune is a mail order from Texas Speed.
My Service Engine Soon light is now on, code scan showed banks 1 and 2 lean. Codes were cleared and came back on again. Vacuum leak??? Fuel?
Also, starting the engine takes excessive cranking. Gotta crank it for about 5 seconds before it fires up.
What do you think is wrong here? Any ideas?
I have a new pump/harness and injectors. Tune is a mail order from Texas Speed.
Thread Starter
Launching!
Joined: Aug 2004
Posts: 284
Likes: 0
From: British Columbia, Canada
The injectors are brand new. Fuel pressure was checked, think it was about 60 psi running. Although, must say the cranking for several seconds before the engine fires is weird...is this normal with a stroker and aftermarket fuel pump? It fires at about 30 psi as it builds. We checked the fuel pressure as well after we turned the key off, it lost all its pressure. It's supposed to hold no?
As for the tune, I am waiting to hit about 300 miles so we can change the break in oil out so I can hit the dyno and get a real dyno tune
As for the tune, I am waiting to hit about 300 miles so we can change the break in oil out so I can hit the dyno and get a real dyno tune
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
It is your 5 seconds of cranking that makes me suspect fuel pressure.
I have a new 419 stroker. I turn the ignition on and listen/wait a few seconds for the fuel pump to prime. It then fires instantly.
I have a 340lph pump; my system gradually looses fuel pressure over about a minute or so. My previous Walbro 255 seemed to hold it longer.
I have a new 419 stroker. I turn the ignition on and listen/wait a few seconds for the fuel pump to prime. It then fires instantly.
I have a 340lph pump; my system gradually looses fuel pressure over about a minute or so. My previous Walbro 255 seemed to hold it longer.
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TECH Regular
Joined: Jun 2012
Posts: 414
Likes: 5
From: SV, AZ
The injectors are brand new. Fuel pressure was checked, think it was about 60 psi running. Although, must say the cranking for several seconds before the engine fires is weird...is this normal with a stroker and aftermarket fuel pump? It fires at about 30 psi as it builds. We checked the fuel pressure as well after we turned the key off, it lost all its pressure. It's supposed to hold no?
As for the tune, I am waiting to hit about 300 miles so we can change the break in oil out so I can hit the dyno and get a real dyno tune
As for the tune, I am waiting to hit about 300 miles so we can change the break in oil out so I can hit the dyno and get a real dyno tune
Yes your fuel system should hold pressure without extended priming. No, what your's is doing is not normal.
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