1999 ford e250 econoline van will crank but will not start in warm weather. but does start in cold weather?

120

Asked by Jan 23, 2015 at 05:44 PM about the 1998 Ford E-250

Question type: Maintenance & Repair

1999 ford e250 econoline van will crank but will not start in warm weather. but does start in cold weather

2 Answers

120

I assume something is sticking, air idle control value, throttle body,.EGR

146,395

Leads me to think it's getting a rich fuel/air mix. Start in cold with a rich mix, as it should, (more fuel than should be in mix) and in warm the rich mix, well, not exactly 'floods' but same principle. Could be some sensor, something feeding wrong signal(s) to ECU. I think an OBD scan is called for on this one. Will eliminate much guesswork, and not buy unneeded parts. It's not an 02 sensor, as it is in open loop on start up. But possibly MAF or MAP

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