ok i just got a 92 civic with a b16a and it has a problem(got the car as is)

if you hold it wide open it will rev to 4k rpm then it cuts out and gos back down to 1k rpm then back up to 4k rpm it will keep doing this as long as you hold it ...now keep in mind i have not let off the gas at all while its doing this...but if you rev it slowley it wont cut out it revs all the way up????

has p30 ecu
now throwing no codes

what i have dun so far
timeing belt
knock sensor
speed sensor
new dizzy plugs wires

im in jonesville nc 28642 if some1 is close and could help me that would be great

 

some help would be nice

 

mayb ecu get a buddy to swap out and see... idk

 

Check/replace the air and fuel filters and check the ignition timing. Post any other info you have about how the car is running- if it's missing at any time or if it has trouble starting. Post if outside temp or engine temp affects the problem. Does this ONLY happen at WOT? Can it get past 4k and if so, how little throttle do you have to give it?

 

starts and runs fine temp dont matter and only happens at WOT at half throttle it wont do it???

 

Really sounds like either a clogged air filter or the timing.

 

i dun the timeing and i got a new filter

 

Did you jump the ECU connector before you set the timing?

 

If the ignition timing is set properly and the air filter is fine then test the fuel pressure with and without the regulator vacuum hose connected. It could be that your FPR is stuck open.

 

yes

 

how do i do that

 

Go to Autozone and borrow a fuel pressure tester. You'll have to put down a deposit but you'll get it back when you return the tool. Connect the fuel pressure tester to the service port on the fuel filter. The line running from the filter to the fuel rail has a bolt holding it to the filter. This bolt has another smaller bolt screwed into the top of it. You unscrew the little bolt on top, the bigger bolt holds the line on the filter and you screw the fuel pressure gauge into the bigger bolt the same way the small bolt was screwed in. Have someone turn the key to on while you watch the gauge. The fuel system pressure should increase and not immediately fall back to zero. Start the car and let it reach normal operating temperature. The pressure should be between 28 and 36 psi. Now, pinch closed the vacuum line running to the fuel pressure regulator on the fuel rail. Remove the line from the regulator while still holding the vacuum line pinched closed. With the regulator disconnected, the pressure should be 10psi higher.

 

yep just got dun testing every thing is fine...what now??

 

I'd check the TPS signal voltage. You set a meter to 20v and turn the key to on. Wedge the black probe in the battery negative post and use the red probe to pierce the TPS signal wire. I think it's the red one but stabbing the wrong wire wont hurt anything. Note the voltage reading. It should be about .45v. Open the throttle all the way by hand and the voltage should increase smoothly to about 4.4v or so.

 

If the TPS is fine, you should take zdizzle's advice and try another ECU.

 

i have p28 but it does the same thing no matter what ecu i run

 

Try running it in open-loop mode by disconnecting the O2 sensor and see if it still does it.

 

ok ill try that later today

 

did this and it stll does it...i tested the tps and the volts where fine with it closed but as i opened it up volts went down instead of up?? i guess i tested it right maybe this is the prob

 

what else could it be

 

It sounds like the TPS wires are switched. Check the wires from the TPS to the ECU. See which ECU terminals the TPS wires run to and search for a p28 pinout diagram to verify that they are connected correctly. Test the wires with a meter at a point just before they enter the ECU connector to be sure each wire has the same signal at the ECU as it does at the TPS. Always test the TPS wires with the engine off and the key at the on position. Also, don't adjust the TPS unless it has been moved before.

 

ok but how could the wires be switched

 

A previous owner would have had to mess it up, or someone they had work on it. Likely when they tried to wire in the motor swap.

 

good day to all

i have a EG 6 with D15b vtec engine
i recently replaced my Electronic Fuel Pump(in-tank)
cleaned my gas tank and also the injector
i also installed a fuel pressure guage
when i started the engine, the fuel pressure is not stable my fuel guage is playing around 32 to 38 psi ive observed some eg6 with d15b when they started their engine the fuel pressure is stable @ 40psi and when the engine stopped, it will still remaine to 40psi
mine is not when i stop my engine, it will go to 30 psi after a few minutes it will be on zero (0)

my main problem is when my car is running at a low RPM (around 2,000-3000) its fine but when i reached 4,500 RPM to activate vtec at 2nd gear, my car chokes like the fuel suppy is not sufficient untill i reached 3rd gear its the same so i tend to run at low rpm

i need help
i hope you guys can help me

thanks

joseph

 

this is my thread if u dont got an answer for me dont post