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POPPING AND NOT STARTING

 
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Old 02-11-2018, 01:25 PM
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POPPING AND NOT STARTING

Sold a 91 b2oa to a friend and symptoms speak for itself. PULLED THE VALVE COVER OFF And both marks on cams line up perfectly. ALL FUSES ARE GOOD . Since its popping I know its getting fuel and spark. i'm guessing its the distributor or the cam sensor. Didn't have much time to go over it all. Any symptoms like these ever get posted/
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Old 02-12-2018, 11:16 AM
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Re: POPPING AND NOT STARTING

Only time I've seen something like that is when the ignition timing is way off. Make sure the distributor is not installed 180 degrees off (yes it's possible to do that). Also verify the spark plug wire routing is correct. The distributor cap should be marked to show which cylinder each wire is for. #1 cylinder is on the timing belt side of the engine.
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Old 02-17-2018, 01:05 PM
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Re: POPPING AND NOT STARTING

So far the timing marks on the belt and cams are dead on.FLYWHEEL MARK IS RIGHT AT TDC. sO i'm guessing its either the distributor module shot. Also could be a clogged fuel filter or pump. Remember a shop had this for a while but gonna see if they put the dizzy 180 off. I noticed new wires on it. tHE SCREW ON THE THE ROTOR CAP IS INTACT.
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Old 02-17-2018, 03:18 PM
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Re: POPPING AND NOT STARTING

Well it fires o.k. according to my timing light. So its either the fuel filter or pump. It primes cause I can hear the pump. Hope it isn't the main relay. USUALLY WHEN YOU TURN THE KEY TO on THE CHECK ENGINE LIGHT GOES OUT LIKE IT DOES. iF IT DOESN'T THEN IT'S THE MAIN RELAY. Hopefully it's just the filter. Dizzy is in correctly.
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Old 02-19-2018, 09:58 AM
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Re: POPPING AND NOT STARTING

NEW FILTER DIDN'T HELP. Also re soldered the main relay and swapped a good ecu in. Still no start. Must be either a clogged strainer or pump. Got them ordered. Will keep you guys posted.
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Old 02-19-2018, 12:14 PM
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Re: POPPING AND NOT STARTING

Slow down and take a minute to re-assess the situation Les. Are you absolutely sure the ignition timing is correct? I'm not talking about the cam to crankshaft timing (timing belt). I'm talking about the ignition timing (distributor position). If you're sure about those, are you sure the spark plug wires are on correctly? I'm not sure you've narrowed it down to being a fuel issue judging by what you said you've done.

It sounds like you are kind of all over the place. Lets get back to basics...remember, an engine needs fuel, spark, and compression in order to run. But these need to occur at the correct time as well. You've verified that you have spark. Have you verified that you don't have fuel? Crank the engine over for 10 or 20 seconds. Pull out a spark plug and smell it to see if you are getting any fuel. If you have spark and fuel, do you have sufficient compression? Like I mentioned before, the only times I've heard an engine pop like you described is when the ignition timing is off. If it's popping you are definitely getting fuel. Whether it's enough is still in question.
But it won't pop if it's not getting any fuel at all.
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Old 02-19-2018, 08:49 PM
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Re: POPPING AND NOT STARTING

when I had the crank at tdc and cams were both pointing up and white line on flywheel was lined up on pointer, I took the dizzy out and double checked the installation. Rotor was pointing up ready to fire no. 1 wire. All wires are perfect.Now it doesn't pop at all anymore. Remember this car has 335,000 miles.I'm gonna spray some starter fluid in it and if it fires off then I'll know it isn't getting fuel. It's a JDM B20A that I put in at 286.000 miles so it's a young engine.
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Old 02-20-2018, 11:02 AM
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Re: POPPING AND NOT STARTING

Kind of makes me wonder if you have more than one issue here since it's not popping at all anymore. Hopefully not. The starter fluid is a good idea. If you get it to fire with the ether then you'll at least know you can ignore everything but the fuel system. Best of luck.
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Old Yesterday, 11:58 PM
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Re: POPPING AND NOT STARTING

Starter fluid didn't work, I remember that when I cranked the engine with the timing light, I put it on the flywheel. I noticed it flashed at tdc instead of 15 degrees. Maybe the distributor is shot? Now it starts to fire only when I have the pedal all the way to the floor. Wonder if the throttle body has anything to do with ignition?

Last edited by Lespaul59; Today at 12:06 AM.
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Old Today, 12:42 AM
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Re: POPPING AND NOT STARTING

Finally started after holding it to the floor for a minute. Problem is that it feels like it's running on one cylinder.So either it's the distributor or the injectors. Is there a specific ohm range they should be in? Also won't idle with it running like that.Almost felt like my teeth were ready to fall out.was also wondering if the fuel injector resistor box is shot?

Last edited by Lespaul59; Today at 12:50 AM.
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