MSQ help anyone? Won't start hot.
#1
MSQ help anyone? Won't start hot.
I have my car starting fine from cold but once switched off and warm I can't get it going again?
It catches but just dies. I've hopefully attached my MSQ if anyone could point out the glaringly obvious that I must have missed.
Thanks
It catches but just dies. I've hopefully attached my MSQ if anyone could point out the glaringly obvious that I must have missed.
Thanks
Last edited by j555pre; 08-17-2010 at 08:35 AM.
#7
Caveat: I have no experience with MS, but from my experience tuning the Hydra:
I get the sense that your warm-up enrichments are way too rich, and that they are overcompensating for your cranking enrichments when the car is cold. When the car is hot, your warm-up enrichments are not there, and although you will have cranking enrichment, it's not enough. Try unplugging your coolant temp sender before a hot start. If you still have it on the front water neck, it should be easy to get to. If this works, then scale back your warm-up enrichments, and increase cranking enrichment.
I get the sense that your warm-up enrichments are way too rich, and that they are overcompensating for your cranking enrichments when the car is cold. When the car is hot, your warm-up enrichments are not there, and although you will have cranking enrichment, it's not enough. Try unplugging your coolant temp sender before a hot start. If you still have it on the front water neck, it should be easy to get to. If this works, then scale back your warm-up enrichments, and increase cranking enrichment.
#10
Well I just had the car running again and it ran well up to 195 F. Then cut out and wouldn't start. The cars temp gauge was just about on half at this point. Is this about right?
Any more ideas anyone? My MSQ is above in the thread and attached below is a log when the motor cut out. Cheers
Any more ideas anyone? My MSQ is above in the thread and attached below is a log when the motor cut out. Cheers
#13
Ok, car started fine and ran ok. AFR was fairly constant but fairly rich. Then something happened when warm and the car suddenly goes super lean (18+) and stalls. I'm thinking could this be the IAC valve suddenly opening fully and allowing far too much air in? Or is this the temp at which a setting changes? Really at a loss at the moment. Logs attached running to stall first and then trying to start.
#18
Thanks but it still doesn't start when hot. Also after warm up it just flicks from AFR 11ish to 18 super lean dies and won't start again.
I'm wondering if its something in my msq or whether its IAC related as it must be getting a whole bunch of air from somewhere or last night whilst asleep I wondered if my fuel tank could be vacuuming and stopping fuel getting through after the car has run a while.
attached is current msq thanks.
I'm wondering if its something in my msq or whether its IAC related as it must be getting a whole bunch of air from somewhere or last night whilst asleep I wondered if my fuel tank could be vacuuming and stopping fuel getting through after the car has run a while.
attached is current msq thanks.