Engine dies when accelerating. Honda Civic

Tiny
SOLALLEIN
  • MEMBER
  • HONDA CIVIC
I have a 1995 honda civic 1.6L vtec. Ok so I recently rebult the engine and head and its been running fine but I noticed that there was a leak from the distributor. I didnt put tighten the bolts all the way or something so I took off the rocker arm assembly so it could go back in. Put it all back together. And it starts right up. Oh during this time I also fixed a vacuum leak I forgot to use some gasket maker when installing the throttle body spacer. When I start it it runs fine and as soon as I start it I can rev it up as far as I want but after about 20 seconds of it being on it wants to die if I press the accelerator. The car has been down for a few weeks and ive tried alot of stuff. Replaced pcv valve rotor button. Cap seems to be fine. I fiddled with the ignition timing and valve timing changing both as much as the adjustments would allow. And no change. The exhaust smells like fuel. Ive recently replaced the fuel pump and fuel filter. It doesnt make sense that the fuel pressure regulator would just go out. So ive been thinking that it was the ignition and not fuel delivery or air. I checked resistance on the coil and its good. Oh heres something wierd. So after it warms up I can press the accelerator to get it up to about 1.5 to 2k rpms and I can keep it there. But it sounds like its misfiring when I do that.
I have checked the TPS, IAT, and MAP sensors all are good. One more thing when taking off the head you have to remove the coolant temperature sensor. But to do this you have to twist the wire as you back it out, theres no way to disconnect it from the harness from what ive seen. I didnt think it was the coolant temperature sensor because the display has a temp gauge and it comes up to operating temp. It takes a little while since I dont have the thermostat in but it does.
please help me. I dont know anyone who has messed around with cars that much and im kinda a poor college student or I would have taken it to a mechanic.

thanks alot
jason
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Saturday, July 7th, 2007 AT 9:52 PM

8 Replies

Tiny
BRUCE HUNT
  • EXPERT
Did you put in a new intake manifold gasket? Is the correct torque on the nuts? Did you get this rebuilt and drive it for awhile and then had it develop the problem of misfiring? I would just like a little more information on the immediate problem. Hopefully, we can give you same direction.
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Monday, July 9th, 2007 AT 9:07 AM
Tiny
SOLALLEIN
  • MEMBER
Yes I did put in a new intake manifold gasket. I got the bolts a little more than hand tight. I didnt use a torque wrench though. Yea I drove it for maybe 1000 miles before the problem started. Do you think it could be a vacuum leak?
Thanks for taking a look
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Monday, July 9th, 2007 AT 11:21 AM
Tiny
BRUCE HUNT
  • EXPERT
If I am not mistaken, there is a cooling hose connected to the intake and even if not, the intake should be tightened to specs because any additional air that is taken in is not monitored by the computer system and can cause problems. I would make sure things are tight. Did you have a tough time getting the plug wires of the spark plugs? You could have a bad plug wire as well.
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Monday, July 9th, 2007 AT 1:45 PM
Tiny
SOLALLEIN
  • MEMBER
The coolant hoses run into the IACV. Its supposed to be there so that the throttle body doesnt lock up or stick when its really cold. I have rerouted mine because of the warm weather its not needed. I will see if they are loose any and see what the torque specs are. The specs shouldnt be much above hand tight. Ive removed it before and had no problem not using a torque wrench. Ill check the resistance on the wires today after work. It would be awesome if it was just a wire.
Thanks again

jason
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Monday, July 9th, 2007 AT 2:38 PM
Tiny
SOLALLEIN
  • MEMBER
Oh yea. I just replaced the spark plugs a little after I rebuilt the engine so I wouldnt think that it would be that.
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Monday, July 9th, 2007 AT 2:40 PM
Tiny
SOLALLEIN
  • MEMBER
Ok so the resistance on the wires is double what it should be on most of them and on one it is 3 times what it should be. I tightened the intake manifold bolts down but there was no change. I think ill take the intake apart and make sure I put enough gasket maker everywhere it should be. Also would wires just go bad like that? It seems very coincidental.

Thanks again
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Thursday, July 12th, 2007 AT 12:03 PM
Tiny
BRUCE HUNT
  • EXPERT
The effort to take them off when they don't want to easily can damage them. They are a composite wire inside that is very easy to damage. You still have coolant flowing throw the IAC valve correct?
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Thursday, July 12th, 2007 AT 3:50 PM
Tiny
SOLALLEIN
  • MEMBER
No theres no coolant running through the IAC valve. That shouldnt make a difference not in the summer in the south I would think. Ive also read of people rerouting the coolant like I have.
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Thursday, July 12th, 2007 AT 5:17 PM

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