My fd was not running due to an issue with the ECU (solid MIL), the ecu was replaced and that resolved it being flooded immediately when cranked.

I have unflooded by putting 20w50 in the housings and it started easily. However attempts to start it there after will not work. It will crank and fire but will not rev higher than the lowest mark on the tach, and when I stop cranking it will slowly die.

If I add more 20w50 to the housings it will start and run properly, until the next time I try to start it.

I have checked the compression and all faces on both rotors have sufficient compression and the car is stock except for the suspension.

Is this an issue with the OMP not delivering enough oil or any oil? If it is can i test that by premixing and not harm the engine by premixing and having the OMP working if it isnt the issue?

I have 10w30 in it right now, would using 20w50 resolve the problem as its thicker?

 

What about your fuel system?

 

to much oil fouls the plugs out.

dont think it has anything to do with oil.

 

My reason for thinking theres an issue with oil delivery was because the additional oil allowed it to start.

A new world (walbro) pump was installed, injectors and rails have been cleaned, the old soft lines were replaced with new ones and the fuel filter has been replaced. This work was done when the ecu died a month ago.

 

A little more info on the work since the problem with the ECU started.

New 7 and 9 plugs were installed, new plug wires, different coils and ignitor were also tried.

The rats nest was redone with silicone lines.

When troubleshooting the dead ecu all voltages in/out of the ecu were checked at the ECU (When not running) and all were fine.

Does anyone know how fast the starter should be rotating the engine? If it rotates slightly faster it will start, I have been able to do it a couple times while trouble shooting the issue but not with any consistency.

 

Whats the compression like when warmed up? Sounds like maybe you have low compression, and when you put oil into the housing.. it boosts the compression allowing it to start.

 

Its possible that its a compression issue. Im still leaning towards another issue needing to be resolved tho. The compression was acceptable, not perfect but within fsm specs when the ecu died.

This all started with me going over a speed bump in a parking lot and the engine died. On attempts to start it there after it flooded itself. Further trouble shooting revealed that the ecu was showing a solid mil and was flooding the engine on any attempt to start the car. In some rare cases after cranking it for a very long time it would slowly start, throttle response would be non existant, it wouldnt idle smoothly and would eventually die. Once the ecu was replaced and it was unflooded it started, throttle response was back, it was running smoothly and would idle without dying.

When trouble shooting I installed the ecu from my car into another FD at the shop, it had the same issue of not starting and over fueling, cranked it for 5 seconds twice and it was mildly flooded. After removing my ecu and putting its working ecu back in it took a couple minutes of cranking to get it started and then roughly 4 minutes of running to smooth out the idle and for it to stop blowing fuel out the exhaust. This is how badly the ecu was flooding.

Im going to warm it up and check the compression again. Its was severly flooded due to the ecu issue and its possible that there is still a lack of oil on the rotors/housings and excess fuel.