too much gas

[NVmyCB7]

My 91 accord got me about 98 with half a tank(from complete fill up of 91) I took it to a smog shop and as I thought high hc and co. The car stumbles when acceleration and if I cruse at around 50 it will start to shake like if it was bacfiring. I checked the tw sensor next to the engine temp sen on the cylinder head and its fine. I also replaced all the fuel inectors thinking that was the problem and the rissistor box. Any ideas of what this could be.

[Leung]

Have you checked for any engine codes?

[BurtonRiderT6]

Check the distributor cap. I actually had one crack in a spider web look to all the terminals and it ran, but like crap and was back firing and what not. Although mine was an aftermarket cap.

[Jarrett]

It sounds ignition related. But, I'm assuming you haven't read the "my car is running like crap" stickies in the beginner's section either. I would rule out everything else first that can be done for free. There's a lot of free fixes to diagnose idle problems that I would do to establish a baseline.

These are located in the stickies but because noone reads those:
http://www.cb7tuner.com/vbb/showthre...t=erratic+idle
http://www.cb7tuner.com/vbb/showpost...33&postcount=1
http://www.cb7tuner.com/vbb/showthread.php?t=146242

Get those things done and then have your igniter inside your distributor checked at Autozone. Call ahead to see if they can.

[NVmyCB7]

thanks for the link Jerrett but i already ran those guys down so im leaning towards an electrical issue thats why i was checking the tw sensor to see if it was working properly cause if it wasnt it would tell the ecu that the car is not warm yet and dump more gas and it also controls the lock up solenoid

NO check engine light codes.

I took it to a smog shop to see what it was doing and this is what it did

15MPH 1500RPM %CO2-14.2, %02-0.4, HC-296, CO-1.09, NO-176
25MPH 1663RPM %CO2-12.0, %02-2.9, HC-2136, CO-1.67, NO-292

thes are the max it could do
15MPH MAX HC 83 MAX CO 0.75 MAX NO 559
25MPH MAX HC 65 MAX CO 0.63 MAX NO 516
catalytic converter was swapped form a cb7 that passed smog with flying colors so that is ruled out. the red number i highlighted is the hydrocarbons which is thru the roof meaning gas is just getting pumped in

The car idles fine no problem with idle./ the problem is under load when i push the gas i can feel some hesitation.


What i have done so far for maintenance
Timing belt (set timing as well)
Balance shaft belt
Distributor cap and rotor
spark plugs and wires
pcv
air filter
seafoam

[curtie94]

I am pretty sure I know what your problem is, The Coolant Temp Sensor. That sensor will tell the computer what temp the coolant is and will add more or less gas. If the sensor is reading cold then more fuel will be pumped in.

[accordztech]

HOLY FUCKEN SHIT! Your HC is off the scale!!!

LOOk, your o2 is basically saying: 1...the cat isnt efficient at breaking down shit...or 2....you have a massive vacuum leak.

I look for vacuum leaks. IT can be anything from a line, to a gasket. What color were your plugs when you took them out?

Your co2 tells you how good the CAT is doing. ANything above 13.3 is good. But with the drop to 12% can be a CAT issue. However you put a good cat in, so you probably have either a air leak before the o2 sensor, or a o2 sensor that can be bias lean making your car run rich.

There is many contributing factors. Even a factor like a bad misfire from a bad cylinder can cause it. You got lots of stuff to look at and test.

[BurtonRiderT6]

I see you haven't tried changing the O2 sensor. Might want to give that a whirl.