PDA

View Full Version : someone help asap please

haystackstang
09-18-2012, 09:42 AM
I have a 90 hatch 2 days ago idle rough and missing so I swapped plugs cause time for 90k service ran perfect for 2 days then yesterday same thing Roth idle missing no power I did diagnosis found no fuel cylinder #2 so replaced injectors did my cap and rotor maf fuel filter started it up ran fine this morning start up idle ok let it warm up and give it gas falls on its face and dies start up again n does same thing?
Darren
09-18-2012, 09:51 AM
Some suggestions to check

plug wires?
ignitor?
you said no fuel in cyl 2, did that get corrected after changing the injectors?

What else changed? did you drive through a big puddle or something?

make sure some wires didn't get damaged in the wheel wells, or other wiring
haystackstang
09-18-2012, 10:01 AM
Yes injectors good I did not change coil or wires no lpuddles ill check harness tonight
iamtheyi
09-18-2012, 10:10 AM
clean out your IACV
haystackstang
09-18-2012, 10:11 AM
clean out your IACV

What is that ? Post pic if possible
Darren
09-18-2012, 10:47 AM
What is that ? Post pic if possible

Idle Air Control Valve, it sits on the underside of your intake manifold, and is often clogged up, shoot some brake clean into the tube that bypasses your throttle body to clean it out
rcdad123
09-18-2012, 10:52 AM
check your intake pipe from the maf to the throttle body. make sure there are no rips in between the rippled parts of the pipe. also make sure the clamps are tight.
wangan_cruiser
09-18-2012, 11:05 AM
Adam the iacv is located at the end of the intake mani close the firewall.
iamtheyi
09-18-2012, 01:24 PM
Do NOT put brake clean there. Use intake cleaner.

I'll take a picture of the hose and stuff. Should be a write-up already. Just google how to clean iacv for nissan 240sx. Should come up.
haystackstang
09-18-2012, 04:23 PM
So will that cause the bogging /misfire feeling?
iamtheyi
09-18-2012, 04:38 PM
No. Bogging misfiring is either the MAF sensor or TPS sensor. For the tps, try and ziptie the plug that goes to it. It tends to come from what I've experienced.

check the voltages going to them.
haystackstang
09-18-2012, 05:56 PM
No. Bogging misfiring is either the MAF sensor or TPS sensor. For the tps, try and ziptie the plug that goes to it. It tends to come from what I've experienced.

check the voltages going to them.

Ok ill try that
haystackstang
09-27-2012, 09:57 PM
was the distributor