Alright M20 Gurus. No start. Spark and fuel present: SOLVED!

[ZM Blue Devil]

which obc?

fuse in the trunk off of the battery?

[jmc1590]

Sounds identical to the problem I had after swapping to a set of M50 injectors. Cranks, no fire. If I held the throttle fully open, it sounded like it wanted to kick over. If I waited an hour or two, it would stumble once like it wanted to catch, but never start. Plugs were also very wet.

Switched back to my original injectors and it fired up 1st try.

[328ijunkie]

Stock injectors and tried 2 sets :(.

[mpowerful]

Id seriously start condsidering either a timing issue or bad harness.

[mpowerful]

No one has mentioned AFM yet either. A seriously borked AFM will cause the car to be way to rich and not run.

[Regnar75]

ICV stuck closed and TPS adjusted wrong?

possible bad harness or bad ground somewhere

are you using decent copper sparkplugs

check to make sure your throttle body isnt seized shut.

is your timing belt not tightened properly

CPS mounting bracket tightened all the way

was there any reason to believe the motor was hydro locked?

you asked for left field :D

[DesertBMW]

So one of the many reasons i hate M20s is BS like this. Gone through every diagnostic procedure in my head.
.

M20 is easy to diagnose.
It must start if everything is true what you said. You got compression and you got spark. Kill the fuel pump fuse, dry the spark plugs, spray some starter fluid, it must fire. Once the engine is running on starter fluid, then install the fuel pump fuse and see if it will run on its own or stall.

[LJ851]

M20 is easy to diagnose.
It must start if everything is true what you said. You got compression and you got spark. Kill the fuel pump fuse, dry the spark plugs, spray some starter fluid, it must fire. Once the engine is running on starter fluid, then install the fuel pump fuse and see if it will run on its own or stall.

You left out time, the sparks need to know when.

[DesertBMW]

You left out time, the sparks need to know when.

You don't know M20.

[Paradox]

Distributor Ignition for the Win!

[tinkerputzer]

Spark plug wire routing verified? CPS and spark plug wire inductance pick up connectors swapped?

[328ijunkie]

Tried all that stuff. Timing spot on, etc.

Solved: Smallest things make the biggest difference. Overlooked this the first time i pulled it apart. Went to reassemble after pulling everything to check timing and spotted this. Not cracked/broken visibly, just has a burn hole. Rotor has <5K on it. Swapped it out and it fired right up. The spark plug to valve cover nut test fails miserably on this one as we did apparently have 'weak spark'. I hate M20's.

[328ijunkie]

I know you said solid spark but If your plugs are soaked after cranking id think your either not getting spark or getting very weak spark.

Who are you. I owe you a steak. Drop ship you some beer/car parts :P?

[LJ851]

injectors stuck open, shitty dist cap, rotor

I believe i nailed this one.

But, according to desertbmw i don't know M20s so you better send the money to killacortes.

[JCarp90]

Yeah where's his $10.