Has anyone seen this issue? My 92 Accord lx cranks and idles good. 2 out of 10 times it runs perfect. The rest .. when i give it gas it lops up and down , but the rpms still rise with each rev. Then when i let off the pedal it goes back to idleing fine at 900 RPMs. this is what i have found so far.

TPS has 5.4 volts to it... and ohms out good closed to open. per manual
Map has 5.4 volts to it... and changes with vaccum... Per manual
cleaned IACV and it seems to be working fine
Fuel pressure with vaccum on it is 34 lbs and rises slightley when reved.
Checked Timing ...good.
Replaced Plugs ...
Replaced Fuel Filter.

Any Ideas Will Help.

 

You checked for codes just for grins and found none.....correct?

You cleaned the FITV and Air Boost Valve.......?

Tune up items (cap, rotor, inspect wires, ect) are up to date, correct.

When you cleaned the IAC, you did bleed the air out of the cooling system.

Does this happen only once the car is "warm"? Or at anytime.

 

Before i started It was showing a tps code 7. I removed it first and checked it... now no codes showing. I did all the tune ups including cap and rotor.Checked and cleaned the Air Boost valve at the same time i did the IACV. I am not sure what the FITV is , i am looking it up now. It does it cold or hot. More so when it is hot .

Just looked up the FITV , and i did clean it also

 

Something interesting i just found. I manifested a guage that reads Bar. When idleing It is reading -20. When i give it gas It goes more positive .To as much as -5.

 

The tps should be sending ~4.5 at wot and ~.5 at idle.

Did you adjust the FITV or just clean it?