I am dealing with an engine that will always crank but only start normally 20% of the time. Mostly I have to go through this cycle of running the fuel pump while in reverse then turn the engine over where it wants to start or starts with a very weak idle for a second or two then dies. I usually get it started after several minutes of the above. Once I get it running, there is a distinct miss/flutter until I accelerate up to approximately 25 mph where I experience a more normal acceleration. This cycle is repeated as I accelerate from every stop. Any advice would be greatly appreciated.

 

Same behavior hot engine versus cold engine?

Exhaust excessively smokey?

One really easy place to start:

Check the duct between the AFM and the throttle body. Secure, no rips, no leaks?

Cheers
DD

 

Yes same behavior with engine being cold or warm.

No smoke from tailpipes.

The afm ribbed hoses are intact and properly secured.

 

I am happy to report that I ma have resolved my issues. I swapped out the cold fuel valve/injector and it is much easier to start the car. The true test will come shortly as cold weather is approaching. I raised the idle speed to approximately 850 rpm which took care of the weak idle. I swapped the aftermarket fuel pump with a used Lucas pump and I have not had a flutter/miss issue. I hope these issues remain resolved so I can work through other issues like repairing the right gas tank that is leaking.