1991 Honda Accord EX, 4 Dr Sedan, FWD, ...

I have recently refurbished most parts in Engine area, @ Professional Mechanical Shop, as included below:

1. However, aft changing these, Idle speed was surging, 1k-2K in Neutral, and surging forward at stop signs in Drive, (so had to put in Neutral at Traffic lights, annoying ..).. then changed IAC twice, AND 3 mechanics can't figure out what is wrong even after adj idle via distributor,... they have cleaned IAC also,..
   
2. Disabling IAC w Solenoid has bypassed this problem,,, I have videos, of idle speed with IAC plugged in (Surging ), and w/o plugging it in (no Surging,..),...
   
3. The following were changed bef I had this problem

• Spark Plugs, Wires,
• Alternator, Starter, Belts,...
• Fuel Tank, Fuel Pump, some Fuel & oil Lines,..
• Radiator, Condenser, Hoses, Rad Cap,..
• Timing Belt & Water Pump, Tensioners
• Oil Pan & Gasket,

Car was parked for few yrs during Covid, but before that, the Car used to drive really well, high speed was smooth, 100-120-140++ kph easy,.. smooth, quiet, normal Idle,... altho Fuel Tank & Rad had started to leak, rusting, so had bought another car, and parked this one,..

Three (3) diff experienced Mechanics have played with IAC, and have changed both IAC valves (one w Solenoid was changed 2x!), but no luck.

Currently, and even before these repairs, with IAC UNPLUGGED, car feels it has enough power, and has v good acceleration for a 23 yr old car, No sputtering ! (==> so NO vacuum leak?) & (NO defective Airflow sensor?),...

I have seen videos of surging problems on YouTube,.. and if anyone has any more suggestions,..

Thnx

Az_99

 

I suggest you sell your useless Honda and get a third gen Camaro. Or Firebird, also acceptable.

 

That was NOT USEFUL.. pls BE NICE,.. TU, but I love my car,.. it is a classic,..

 

Maybe so, but this site is dedicated to third generation Camaros and Firebirds.
Try a Honda forum.

 

https://honda-tech.com/forums/