Ok, it started out as a slight bog or hesitation at low RPMS when I was at a stop light... If I reved a little bit (1500 RPMs or so) and took off it was fine... Lower RPMs would bog and sometimes die... In reverse it was horrendous and Id pretty much always kill it like I was a newb driver in a standard... So I replaced the fuel filter... It seemed too help... But about a week ago I was driving it kinda hard and in 1st gear when I was at about 3k it just bucked hard for no apparent reason... Kinda like I hit the clutch and then let off (which I didnt)... Well then it just started to get worse... Now it does it at just about any interval... But its only on acceleration...

The only way I can make it do it every time is to try and launch hard, like rev it up and then let off the clutch and it'll go VRROOOM BUCK VRRROOM BUCK VRRROOOOM thru 1st and 2nd, and then thru the rest of the gears its usually fine... Ive driven it on the hwy at about 80 MPH and no bucking at constant speeds, even tried it in like 3rd gear just too see if it would do it when it was revved way up, but it only does it when I accelerate and mostly accelerate fast (but not all the time)...


So from searching posts here and some of the suggestions from friends, I have replaced cap, rotor, fuel filter, plugs (they arent old or fouled), plug wires, entire throttle body (with TPS), cleaned off the oxygen sensor (sprayed compressed air thru it and it didnt really look that bad no real build up on it), ran some fuel system cleaner in the fuel tank and it still does it... What else could it be?

My thoughts are:
injector (I would think it just miss, I dont think it would cause the entire engine to lean out and buck)
fuel pump (I would think it would do it all the time, specially when its peaked at high speeds if it were a weak/clogged pump, but I have a friend who swears this is the problem... Im not convinced tho...)
fuel pressure regulator
distributor

What do you guys think? I really need to get this solved, been messing with it for a week now and I need my car as Im a driver at work... Any help is appreciated...

Edit: Oh and yes there was a CEL... It only did it once when I first put the newer throttle body on there it was code 7, the engine is a D15B VTEC with a P28 BTW... Code 7 being a TPS sensor... It didnt throw any codes with the old one, and it still does the problem with both, and it hasnt done it since I first put it on...

 

timing,battery-alernator,!!

 

got a cel

 

hey exempt, did you ever resolve that issue. I'm having the exact same issue

 

Yea... The problem was my engine mounts were bad which made the engine come down and crushed the connector for the TPS sensor (it sits by a bracket on the fuel filter on CRXs/EFs)... And when I would take off the engine moved and broke the connection, but i guess only enough throw a code sometimes...

So I spliced on another connector and it was fine... I now plan to fix my mounts...

 

My car had this same problem sort of...

One day I was getting on an on ramp and all of a sudden it bogged a bit...I put the clutch in and revved and it seemed fine.

A couple days later I was leaving a buddies and it did the same thing..so I did the same thing. About 10 miles down the highway later the ultimate bog kicked in. I couldn't go over 50.

I got off the highway and nursed the old girl back home. At times the entire car would buck and jump. Pretty violently too...I had to stop a few times on the way and give it a break..I thought I fucked my car royally...

After replacing everything you replaced I found out I had a bad dizzy....

 

thats exactly what mine does, but at least yalls idled. ill start mine and it dies, if it does idle, the slightest press of the throttle kills it. So maybe a new TPS SENSOR will work? Or could it be the dizzy?