S2000 Engine Management Engine management topics, map and advice.

car suddenly wont start

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Old Mar 3, 2015 | 07:11 AM
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Default car suddenly wont start

Hey guys, I could use some help since I've hit a wall in ideas. The car was tuned by blevins last year on 85 and pump. After a few tanks it started to cut out in boost with e85. I switched over to pump and it had the same issue. I parked the car for about 2 months. Now it wont start at all, just cranks. Its getting spark and fuel but not firing. Not even a hiccup.. I connected my laptop to see if there was anything fishy going on and I noticed some timing errors as I cranked..every rotation or 2 it would add an error..

Any ideas?
Cam sensors?
Crank sensor?
Best way to go about checking these sensors?
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Old Mar 4, 2015 | 06:16 AM
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Checked timing today and im getting signal from cam and crank but still wont start
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Old Mar 5, 2015 | 05:48 AM
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Got it started today with starter fluid, and will stay running, but it is idling at 3500 rpm and rich 10:1 afr. Also when I hit the gas it stalls
Any ideas?
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Old Mar 8, 2015 | 07:14 AM
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found a vacuum leak at the injector after fixing that the idle dropped down to 1100-1200rpm, but the car still wont start without a little starter fluid.
The car still stalls when I crack the throttle.
If I unplug the map I can rev the car, but If I put it in gear it does not get to far without stalling(map disconnected)
The car will not start with the map sensor unplugged either.
im getting a reading on the ecu from the map sensor but its only -7-8 psi at idle.. I would think there would be more vacuum than that.
Is my map sensor not reading correctly?
Should the car start on its own if you unplug the MAP?
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Old Mar 19, 2015 | 08:59 AM
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No car will have issues without MAP I believe. Your car should have 20" at idle. More exact info can be found on manual. To test MAP sensor is pretty easy in my opinion. Go buy a vac pump that can show your readings, pretty cheap like $50 at local auto store; plus makes brake fluid changes WAY easier and one man. Unbolt map sensor off throttle body and leave connected to electric harness. Pump up 20" on vac pump with it connected at sensor; it will not leak down if you have it connected to MAP sensor securely. Look at what ECU is reporting. If it also shows 20" then your MAP sensor is good and you still have more VAC leaks to find. Let us know your findings.
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