This has happened to me a couple of times now, and I can't figure out what it is.

Keeping a steady 4k in 1st/2nd gear, I will get like 5 small misses in a row and lose power. It will happen quickly and then go back to normal like nothing happened.

I just replaced the cap/rotor about 3 months ago, and was having some problems with the rotor screw coming out...It's now thredlocked in there. Plugs were changed (NGK BKR6E-11's) about 2 months ago.

My first guess would be the rotor in the dizzy...but that thing is tight. I pulled the plugs, and they are a greyish color (NGK normal color), so I am not sure what it could be. I am also getting a little bit of hesitation when taking off at about 4k in 2nd/3rd, and when I let off the gas it jerks a little bit then starts going down smoothly.

Any suggestions?

jB

 

which motor?

 

Timing....Might wanna check it ...Could be to far advanced or vice versa..just check it ...its a start

 

90 CRX Si/B16a-I/H/E....NAWWWWWWWSSSSSS.

I checked the cap/rotor and it's still tight. Timing was set to 13btdc about 3 weeks ago (For the n2o).

The wires on top of my dizzy....well, lets just say they're not in the best of shape. I'll take a pic so you guys can see..... They're soddered though, so I thought they would be okay. (When I installed my tach, I stripped the rubber off the wire going all the way in to the dizzy...so there is no rubber outside...just about an inch of open wire coming from the dizzy, soddered to a 6" wire that is then soddered to the wire on top of the dizzy going to the tach. My remote start wire and my Autometer wire are both spliced off that and soddered also...).

In order to check it, would I just touch the ground (meter) to the car and pos to that wire, or do I have to ground to another wire coming out of the dizzy?

As far as maybe being a fuel problem, how could I access that and a fix?

jB

 

I've started getting the same problem since I did an mpfi swap on my std.

 

How old is your swap? Has it always done this, or is it just a new development? The symptoms you're describing sound an awful lot like the o2 sensors are switched. You might want to try swapping them around and see if that fixes the problem.

Good luck,

RYan P.

 

Swap has been in there about year and couple of months. I bought the car in December, and it had been in the car about 8 months.

Going down the freeway, it would hesitate every couple of seconds...Not really miss, you could feel it pulsating at it lost/gained power. Like going up a hill, you could notice it more. It has been doing it a little bit since I got the car. I did fuel injection cleaner, tuneup, etc to it and it went away for a while but came back.

I switched the o2's last week, and it ran like CRAP when I did it. It was REALLY jerky, and really rich (according to my "SUPER" accurate A/F guage). The hesitation multiplied too when I switched them...so I switched them back.

jB

 

on my b16 i had the primary and secondary o2 sensors switched..it cured my hesitation problem, which was very similar to yours..hesitation at light throttle, ie cruising

 

I've got the same issue - it's been discussed in a topic titled "Hesitation" recently. Sad to say, but my problem which I thought was fixed seems to be coming back. I changed my 4-1 headers for 4-2-1 & put in my new o2 sensor, only to have the problem start to come back. I'm going to try to replace my o2 sensor again with an extra one I have & see what happens then. If I get the same problem with a 3rd o2 sensor, then I'm going to have to figure out what would kill an o2 sensor or why the ECU is having problems getting the air/fuel mixture right when in learning mode...

Eric

 

Has the fuel pump volume been checked? I get the impression of some pump failure, or failing under a load.

 

it was funny..my hesitation problems were identical to yours..i would also get black carbon on my tail pipe and blow a cloud of black smoke..but when i switched my o2s so the primary was on the driver side and secondary was on battery side it really did cure the hesitation and fix the rich fuel problems.

 

I've got something like that going on... air/fuel stays rich when cruising after the engine has been idling, if you let off the gas so it goes to full lean then it runs in stoich normally until you stop at a light and let it idle again. It kind of jerks when you let off the gas about half a second later, as the air/fuel goes from rich to stoich (hesitates) then drops back to lean.

Reeeeeally weird... I figured it was an IACV problem or a fuel pressure problem... but it seems to do this no matter the fuel pressure.