Slow starts

[Jean]

I think ever since I've had my car it never (rarely) started right away like the new cars do. It's quite annoying and I want it fixed. It did this with the m10 and doing the same thing with the m30. Starter cranks right away, battery / alt is good. Fuel injectors have been rebuilt, new fuel filter, new plugs, ignition components, tried multiple dmes...same thing.

It takes about 1 second to start, and I want it to start right away.....

I am thinking it's one of the two fuel pumps?

[jlevie]

The first things to do are to check the fuel rail pressure while cranking the engine after it has sat for a while and have a smoke test run on the intake to look for intake leaks. The rail pressure should be close to normal and come up to normal within a turn or so of the engine. A leaking check valve can cause pressure to bleed off when the car sits, but if the pumps are good the pressure should immediately reach normal.

[Jean]

All the gaskets and hoses are new, but I did re-use the brake booster check valve. Would a failing FPR affect this?

[Lunner]

Just a noob shooting in the dark here but this sounds a lot like my starting problem, and the culprit was the flywheel.

Have you had a chance to see the condition of your ring gear?

[Jean]

Yeah, it's fine and starter is good as well. Fuel pump(s) are the only original components left to swap...

[Wh33lhop]

Have you checked the CPS?

[Jean]

It ohms out ok.

[Wh33lhop]

As I recall, that doesn't necessarily mean it's in perfect working condition. We just traced a no-start in my buddy's M20 to the CPS, it starts right up now as opposed to the long starts beforehand. $40 fix. :) Do you know someone with a B35 without the long start problem? Couldn't hurt swapping it out.

[Jean]

Might give it a shot since it's easier / quicker than a fuel pump swap for now...

[StereoInstaller1]

I swear, I am gonna install a permanent fuel pressure gauge on mine