I am new to this forum and hope I can get some help. I have a 91 integra gs. I recently tried to adjust the timing because it randomly idles rough and with low rpms. Sometimes it idles smooth, but the rpms and are 1K and above. I did everything that is suppost to be done. I jumped the 2 wire connector under the dash, hooked up everything, set my timing light to 18 to set it to 18BTDC and run 92 Octane gas. The thing that is wierd is I had to turn my §§§§§ all the way counterclockwise and I can only get it to 17BTDC. Now, it still has the idle problem but it has a random misfire. Or, a non smooth idle. I changed the spark plugs because it had autolight plugs in it, so I put NGK’s in it. The wires, cap and rotor looked new so I didnt change those either. Any help would be greatly appreciated. Thank You.
clean out your iacv
Just did it. A little better. And I re-set my timing. This time I just had the advance set to 0 on my timing gun. It seems to run smoother. But now the idle will shoot down and almost die sometimes, especially when first starting it up. Any ideas there? Thanks again.
FITV maybe? its that other unit bolted to the back of the intake manifold with 2 coolant hoses running to it. maybe clean that and make sure the plastic white plugger screw is tight. that thing caused some stupid idle problems for me.
i have the same problem especialy when i’m at high rpms and i let go of the gas then hit it again i sometimes get a big backfire. i’ve cleaned everything and gotten new spark plugs. i can’t do the timing. and i want to do the valve adjustment but affraid i’ll screw it up even with the teg tip.
Yeah, I found a teg tip on diagnosing the IACV valve and the FITV but now cant find it. You do it with the intake off which I am about to do because I am putting an Injen on it as soon as I get it. It might be possible that one of the valves might just be bad.
hmmm, yeah there seems to be allot of idle problems with these old teggy’s. As far as the valve adjustment. You might be able to have a shop do it for not that much if you do not want to do it yourself.
Found it. I am going to go through this teg tip like crazy. Also I am going to use some seafoam and change the PCV and see what happens. I will let you know how it turns out. Here is the link to the teg tip.
The first thing to check is the basics. Pull the valve cover and turn the crank pully until the sole white mark on the crank pulley is under the lower cover pointer. Then look up at your cam gears and see if they are in proper alignment. Remember, if the intake cam is skipped a tooth on the belt, the distributor will be thrown off because it runs off the end of the intake cam. Now that the cam timing is checked, you can move on to valve adjustment, ignition timing, and setting idle. Also check for vacuum leaks around the intake and throttle body.
BTW, you do not need to run anything over 87 octane on a B18A/B engine, unless you increase your compression or drastically advance your ignition. You will just be wasting your money.
Thanks, yeah I just filled up with regular 87 octane again. I just gave it some seafoam and changed the pcv last night also. I think it helped but cant tell because the problem is intermittent. I did a timing belt, water pump and valve adjustment on it recently. Everything seems to be good, timing marks lined up and everything. So I geuss maybee I just need to try and set the idle. Seems like that would be all that is left to do especially since the problem goes away when the rpm’s are about 20-50 higher.
that is how you are supposed to set the timing to 16 BTDC.
the teg tip article tells you to set the gun at 18 and then adjust using the red timing mark. this is wrong, it would set the timing at 36 degrees which would be bad. if you want to set it to 18 degrees you need to set the gun at 18 and time the engine using the white timing mark. the white mark is the marker for 0 degrees or TDC. setting the gun for 18 from that mark and then adjusting will give you 18 BTDC
Nothing over 87 octane
I use 91 only. I tried to use 87 or 89 and drive regular and my car will guzzle the gas like nothing. The omly gaas that lasts in my car is 91 or better. The performance mod I have are headers, msd wires and cap, bigger injectors no ac or ps, 2 1/2 inch exhaust, cai and a chip. Maybe I’m doing something wrong I haven’t tuned lately.