1998 Honda Accord 98 Honda Accord Stalls

Hi safet35, several things I would like you to check, one is, fuel pressure, I will send you a link that will show you how to do that, also I would like you to check the tps(throttel position sensor) and the idle air control valve as this is what stops your car from shutting off when your foot is released from the pedal, unless you have a fuel problem.

Here is your link on how to check fuel pressure ,

https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm

thanx
joe

To check the IAC motor remove the unit, with the wires connected turn the key to the "on" position without starting the engine, the IAC should move in or out. If the IAC motor does nothing it has probably failed, replace it with a new unit and recheck system. Note: while the IAC motor is removed clean (use aerosol carburetor cleaner) the passages the IAC uses to control idle air speed

P0401 Exhaust Gas Recirculation Flow Insufficient Detected

P0420 Catalyst System Efficiency Below Threshold (Bank 1)

P1456 Leak Detected In EVAP Control System

codes are kind of vague, but, 401 can mean pcv valve, clogged, which, you should change anyway, because its such a cheap fix, also, the egr valve could be faulty, or Im guessing the egr tube is clogged, .420 could be a bad oxygen sensor on bank 1 or even a clogged, catalyctic converter, I would go with the oxygen sensor, but you can put your hand on the muffler really quick when you first get it started, to see if you can feel a strong pressure from the exhaust. No p1456, can mean a bad, fuel cap, or a bad evap canistor, or a hole in the evap canister hose. Try the gas cap first, so many people fail inspection just because of that, its pitiful, and a weak gas cap will give you a check engine light, we wont worry about the tps just yet.

Ok, im sure you have several things wrong here and yes it still may be, the iac. But you brought something to my attention with the brake booster vacuum, I want you to put it back on, try to get the car running, once you do, I want you to take a needle nose pler and pinch the hose closed, tell me what happens, also did you check/change the pcv? And also you will have to take a look at the egr, valve. There is a hose that, may be clogged too, (gas recirculatory code). Sometimes one of problems will cause three other codes.

Awesome, keep me posted
thanx

Nice