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So as the title suggest im having warm start cranking issues.
Cold start it struggles a little but fires up, Warm starts it just wont fire, I increased my ve cranking table and managed to get it to start by holding it at WOT. Any ideas?
if it's managing to start with an open throttle it sounds like too much fuel, I don't know which ECU you're using but here's a good webinar using the Link platform:
Trouble with warm restart is unusual if it cold starts ok. I'd start by making some dramatic changes to your cranking enrichment in the areas you're having trouble. It may be that you have too much fuel or not enough so I'd tend to try going both ways and see if you find an improvement. Unfortunately this area of operation can't adequately be tuned with a wideband so it's more about doing it by feel (not strictly helpful I know). When you're making changes, I'd start by making them large - double or halve the values you currently have to get a real feel for whether you're moving in the right direction. You can fine tune once you find out where the ball park is.
You may also want to consider the VE or fuel table values in the area of your fuel table that the engine cranks in - It may well sit at 30-40 kPa and 750 rpm while idling, but during cranking it is likely to be sitting at 200-400 rpm and -10 kPa or thereabouts. Typically any cranking enrichment is a multiplier on top of the calculated table values, so if your fueling is way wrong in the main fuel table then it's going to make it hard to tune the cranking enrichment as you'll be effectively putting a bandaid on the real issue.
Should have clarified using an adaptronic E420c
Its bizarre case and ill try those things you've outlined. It really is abit of guesswork.
Thanks for the responses
just to rule it out make sure your trigger voltage thresh holds for low rpm (400) are around 0.1v with stock distributor triggers.
this can raise its head when warm, it doesn't explain the throttle helping to start it, that sounds like your to rich.