Problems starting after fuel filter/water separator change

alldodge

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Staff member
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Mar 8, 2009
Messages
43,100
Confirmed spark today with a spark tester.
Assuming this was a blue or white spark (3/8 gap) and it repeated this spark several times as engine was cranking

What we know;
Have spark
Fuel pressure is low but available at 30 psi

Remove flame arrestor, dribble a very small amount of gas down the throttle body. Crank motor and answer does it start or try to?

If it does try, get a Noid light and put on injectors when motor is cranking. Does the Noid light flash as motor is cranking?
 

helix757

Cadet
Joined
Jul 29, 2022
Messages
14
Assuming this was a blue or white spark (3/8 gap) and it repeated this spark several times as engine was cranking

What we know;
Have spark
Fuel pressure is low but available at 30 psi

Remove flame arrestor, dribble a very small amount of gas down the throttle body. Crank motor and answer does it start or try to?

If it does try, get a Noid light and put on injectors when motor is cranking. Does the Noid light flash as motor is cranking?
I just purchased a basic code reader, its coming tomorrow. I will circle back with any codes it throws.
 

helix757

Cadet
Joined
Jul 29, 2022
Messages
14
One thing that I did notice last time I was down at the boat is that while cranking, the Tach goes crazy. Not sure if that is relevant
 

Scott06

Admiral
Joined
Apr 20, 2014
Messages
7,055
One thing that I did notice last time I was down at the boat is that while cranking, the Tach goes crazy. Not sure if that is relevant
Disconnect it to test bad tach can kill the ignition

Had a similar post on the GTO forum I frequent where one of the guys installed a Progression Ignition distributor (electronic can change timing curve on an ap), during cranking his tach was going nuts and no spark. turned out he was getting EMF from a failing starter. Progression sent him a new dizzy same results , on a hunch he replaced the starter and everything worked... not saying thats whats happening to you but had everyone stumped for a month or two
 
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