1990 Miata DIYPNP hard to start cold.
#1
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1990 Miata DIYPNP hard to start cold.
Hey guys first I'll tell you what im working with. Its a turbo'd 1990 1.6l with a MS DIYPNP, Map daddy 4 bar map sensor, BMW tps, runs great. The problem is when the engine is cold i have to crank for around 10 seconds and pedal the gas for it to start. When its warm it fires right up. I feel like it may be related to my IAC... thats also just my guess... i dont have a clue. If anyone could help it would be great! Let me know if i should post anything to help out. Thanks,
Mike
Mike
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you have to hold the throttle at about 2,500rpm for a few seconds then its fine. If you dont it will stall. Runs great with great AFR's. Ill try increasing the PW either tonight or tomorrow and and see if it changes anything.
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That would be awesome! Mjmcarthur92@aol.com. As for the afr's im actually not 100 percent positive. My wideband sensor is at the end of my downpipe and I don't have an exhaust on the car yet so its not accurate in its current location. When tuning on the dyno I welded a bung further up stream and used an external wideband. My problem seems very similar to the thread that just got posted after mine "cold starts will end me" hopefully one of us figures this out lol.
#7
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Hmm our problems seem to be a little different actually. You have trouble getting the car to start, mine fires right up but immediately falls on its face, and if I touch the gas it'll stall.
You also use your IAC, I don't.
+1 to taking a second look at your cranking PW's.
You also use your IAC, I don't.
+1 to taking a second look at your cranking PW's.
#8
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Ahh I see, miss read your thread , mine has a nasty hesitation also that I didn't mention that's like you described, when you touch the gas after starting it will hesitate and stall if you hold the gas. Problem gets better when the engine is warm. Maybe I can learn something from your thread also!
-Mike
-Mike
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