95 Civic d16z6 runs but won't take gas
03-02-2012, 05:22 PM
#26
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Re: 95 Civic d16z6 runs but won't take gas
any numbers on the gauge? you should see fuel returning to the tank from the regulator at idle when you disconnect the vacuum hose, the regulator function is to maintain steady pressure of 40-60 psi,( down from 100 psi supplied by the pump)
so if the regulator fails, the injectors will get full pressure of the pump, which in turn results in too much fuel being released by the injectors into the manifold/cylinders, the plugs get soaked, etc etc, to the point of no detonation.
what is the PSI on the fuel? the pressure cannot be too high nor too low, it has to be right, hence is the fuel pressure regulator.
so if the regulator fails, the injectors will get full pressure of the pump, which in turn results in too much fuel being released by the injectors into the manifold/cylinders, the plugs get soaked, etc etc, to the point of no detonation.
what is the PSI on the fuel? the pressure cannot be too high nor too low, it has to be right, hence is the fuel pressure regulator.
03-02-2012, 05:27 PM
#27
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Re: 95 Civic d16z6 runs but won't take gas
sounds like your map sensor to me... an o2 code cause it to run slightly rich but not like you're describing... I had this happen after my b20 vtec swap... it wasn't the actual sensor it was the tune looking for the wrong sensor... so check and double check your map sensor
03-02-2012, 05:51 PM
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Re: 95 Civic d16z6 runs but won't take gas
maybe a long shot but hell its worth a shot. Check for a good 1/2 inch of blue spark, at the plug wire, by using a round shaft screwdriver to ground. If the spark is weak, check spark right from the ignition coil tower, you want a good 3/4 to an inch of spark right from the coil tower. If spark is weak from the coil, look for a bad ignition coil. If spark is good, look for a faulty ignition rotor and distributor cap.
03-02-2012, 06:11 PM
#30
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Re: 95 Civic d16z6 runs but won't take gas
maybe a long shot but hell its worth a shot. Check for a good 1/2 inch of blue spark, at the plug wire, by using a round shaft screwdriver to ground. If the spark is weak, check spark right from the ignition coil tower, you want a good 3/4 to an inch of spark right from the coil tower. If spark is weak from the coil, look for a bad ignition coil. If spark is good, look for a faulty ignition rotor and distributor cap.
03-02-2012, 06:16 PM
#31
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Re: 95 Civic d16z6 runs but won't take gas
might be worth a shot but first maybe start it up and then pull the brake booster line off and let me know what it does with a huge vacuum leak like that
03-02-2012, 06:22 PM
#32
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03-04-2012, 11:18 AM
#33
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Re: 95 Civic d16z6 runs but won't take gas
Pulled vacuum line off the brake booster and it idled up to about 2000rpm. After it ran for a minute, it started going from about 1500 to 2000 back and forth constantly. Also, I checked the spark, and I have maybe 1/4 inch of orange and blue spark at the end of the plug wires. What would be the best way to check for spark at the coil itself? Any other suggestions based on this? Any help is GREATLY appreciated!!! Thanks.
03-05-2012, 05:31 AM
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Re: 95 Civic d16z6 runs but won't take gas
Is you fuel pressure on the gauge you installed staying up after you shut the engine off? It should hold pressure for some time, let me know.
Last edited by the_guchi; 03-05-2012 at 08:01 AM.
03-05-2012, 08:58 AM
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Re: 95 Civic d16z6 runs but won't take gas
If you can pull the fuel rail with the injectors still attached, from the manifold,turn ignition on and see if injectors are bleeding gas, be careful, hot engines and gas=fire.
I would even have someone crank it for few second while I watch for proper injector operation, have a big rag or container to catch the spray to prevent fire, I'd have a fire extinguisher ready and water hose just in case.
Cheers
Sam
03-05-2012, 02:09 PM
#36
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Re: 95 Civic d16z6 runs but won't take gas
03-06-2012, 08:42 AM
#39
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03-17-2012, 11:11 AM
#41
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Re: 95 Civic d16z6 runs but won't take gas
Finally had a chance to check the timing, and all marks are exactly as the diagram shows. I'm gonna replace the belt and water pump while I'm here, but by the diagram it doesn't appear to be off a tooth (I was actually hoping it was so I would finally know what to do to fix it, lol.)
03-25-2012, 01:20 PM
#43
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Re: 95 Civic d16z6 runs but won't take gas
Is it possible that the timing belt could be stretched enough for the timing to be off under hard acceleration but still be right at an idle? Just a thought... I pulled everything off to check and replace the belt and water pump. All marks lined up, but ther was enough slack in the belt to pull it off without taking pressure off of the tensioner.
04-20-2012, 07:53 PM
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Re: 95 Civic d16z6 runs but won't take gas
could be just "blowing smoke" here but is it any possibility that your coworker accidental pumped diesel fuel? and it was a different problem before adding the diesel to your 1/8 tank gasoline? im not really sure what would happen with a diesel/gasoline mixture in a gasoline engine but my guess would be smoke and bog and foul plugs. I would try emptying fuel and putting in some fresh gasoline just to be sure. seems like everything had been meticulously gone over. so couldn't hurt to try.
04-20-2012, 08:12 PM
#45
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Re: 95 Civic d16z6 runs but won't take gas
could be just "blowing smoke" here but is it any possibility that your coworker accidental pumped diesel fuel? and it was a different problem before adding the diesel to your 1/8 tank gasoline? im not really sure what would happen with a diesel/gasoline mixture in a gasoline engine but my guess would be smoke and bog and foul plugs. I would try emptying fuel and putting in some fresh gasoline just to be sure. seems like everything had been meticulously gone over. so couldn't hurt to try.
04-16-2015, 02:36 PM
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Re: 95 Civic d16z6 runs but won't take gas
I'm new to all this but I have a 1999 honda civic ex with a b16z6 v-tech in it and I'm having the same problem it won't take gas it just bogs down it won't shut off but it won't take gas either I've done almost everything I can figure it out please help
04-16-2015, 04:46 PM
#47
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Re: 95 Civic d16z6 runs but won't take gas
Has nobody said FUEL PUMP in this whole thread?
It seems fuel pressure is right, but what about the VOLUME of fuel.
Sounds EXACTLY like issue on my other vehicle. I drained the oil;it was equal parts gas and oil, I have that on video. (Wowza. I hope the engine made it when I change the FPR and injectors and add fresh, thick oil to sop up all that gas.. which is everywhere inside engine.) BLACK SMOKE and OIL SMELLS LIKE GAS for obvious reason. BAD fuel economy.. it wont even RUN; lucky of it STARTS. Was probably stuck open. FLOOD wasnt even the WORD.. and I STILL question my fuel pump. Though I have an intermediate step now: FPR and injectors.
This may have been asked before, so if it was then I apologize, but. How does the OIL smell? And how do the SPARK PLUGS look?
Also, while we are at it.. How is your spark and EGR?
It seems fuel pressure is right, but what about the VOLUME of fuel.
Sounds EXACTLY like issue on my other vehicle. I drained the oil;it was equal parts gas and oil, I have that on video. (Wowza. I hope the engine made it when I change the FPR and injectors and add fresh, thick oil to sop up all that gas.. which is everywhere inside engine.) BLACK SMOKE and OIL SMELLS LIKE GAS for obvious reason. BAD fuel economy.. it wont even RUN; lucky of it STARTS. Was probably stuck open. FLOOD wasnt even the WORD.. and I STILL question my fuel pump. Though I have an intermediate step now: FPR and injectors.
This may have been asked before, so if it was then I apologize, but. How does the OIL smell? And how do the SPARK PLUGS look?
Also, while we are at it.. How is your spark and EGR?
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