fastblacks2k

Ok this will be sorta long so I apologize and try to stay with me. I have a 98 ek, originally automatic, converted to manual from the previous owner. I had a B16 in there before using the stock wiring harness, just ran my own vtec wires, and was running an obdI ecu, and all was good. The motor was getting older and its my daily anyways, so I offed that swap and picked up a B18b b/c I don't need anything special. Its been swapped in now, and its basically the same deal as the B16, its an obdII engine with an obdI ecu, same wiring harness, same vacuum lines, ran the same etc. The problem is I'm getting a bad idle, the typical roaming idle that comes with a tps or iac issue. Also while driving at maybe 1/4 throttle it stutters real bad, but holding the throttle at like 4k or above its fine, as well as normal freeway driving, and wot... all of those are good. I am getting a cel #14 (iac valve) So a few days ago I pulled it in the check for any vacuum leaks as well as to check my iac and tps. I swapped my iac with my buddies off his teg, which runs great and has no cel. I also took apart my fast idle valve and cleaned it real good. Well his cont. to run good w/o any cel's and mine still sucks. So next I checked the voltage on the tps, .5 at idle, 4.5 at wot, dead on. Took it off just to look for any possible issues, put it back on, re-calibrated it right back to the same numbers, but when I went to start the car it wouldnt even stay running. So the next step was swapping on another friends tps, and fast idle valve, knowing both were good, and the car started but ran worse than before... horrible stumbling trying to accelerate, unless I went wot which worked fine, but then the car would die upon slowing to a stop. So after talking to a honda tech I know I tried switching my entire tb with my friends teg, as well as ecu for the hell of it, and still the same issue. So to sum it up, I've changed ecu's twice, tps, map, iac, and fast idle 2-3 times, and an entire tb once, and all yielded the same crappy results. I had this same setup in my old eg, and all was good, so I'm left staring at my car with no more ideas.... and its winter here in Ohio, and driving the S2K in that weather blows... so I need as much help as I can get, as quick as I can get it.... If you've read this far thanks and hopefully you have an idea.

carfreak2020

my EJ did the same thing but i just had to changed plugs and wires and then it ran fine...dont know this is any help or not....

pArAdOxsqUArE

maybe the timing belt is off by a tooth or 2.. that happened to a current GSR motor I put back together. it was fine at the time it was assembled but some how it jumped a teeth and ran like **** under 3-4X000 RPM's.. hope this helps.. GL with getting it fixed

check for a bad ground too?

sde780

Check your mechanical timing and ignition timing, being off by a tooth will make it run like ****

Arthas

Wall of text hit Arthas for 23533 points. Arthas was rendered unconscious. Insert .25 to continue

fastblacks2k

i already changed the plugs, wires, cap and rotor, but it had no effect... forgot to mention that. as for the timing thing, its been brought up but i haven't had a chance to check it, but wouldn't it run horrible if at all, through out the rpm band if it had a jumped a tooth or two? that seems pretty extreme... especially b/c it drives fine through out the rpm range, as long as i dont try to hold a steady rpm below 3-3.5k at around 1/4 - 1/2 throttle. if i drive it just normal ( part throttle or so up to around 3.5 - 4k when i shift) it drives fine, as well as holding a steady rpm on the freeway, even if its only at 1/4 throttle... but i'm running a b16 tranny so at 65 im almost at 4k? thanks for ideas though... im open for literally anything. only solution ive found so far is gas, lighter, and a cliff lol.

95Sol99civic

Maybe a vacuum off. Wish I wasn't an hr away with no gas $ I would check it out. I will ask around

D16SiHatch

haha thats a new one for me. i like it lol

fastblacks2k

thanks man... yeah its been a headache to say the least... i mean i know my way around the engine bays of hondas pretty good, not to mention all my friends w/ hondas, and the master honda technician i know... and its stumping all of us lol. we have figured a ground, vacuum, or electrical. but we cant trace anything to do with those 3 down. i mean ive switched the tps, iac, fast idle, tb, and map sensor with known working parts from a teg and it acted the same?

pArAdOxsqUArE

i also had a 94 gsr motor with a 96+ lower timing belt cover and a B16 crank pulley.. the crank pulley marking doesn't line up to the cover... etc.
(don't like runing my motors w/o a cover and the gsr crankshaft was slightly cracked)

you got to take the crank pulley off and the washer and look for the marking on the crankshaft end itself and match it to the mark on the oil pump.. that's the only correct way to make sure.

Gonzob16

I will be sure to let Jason know about the timing, any other ideas?

sde780

if the timing's off it could stumble at certain RPMs, at least that's what mine did. takes all of 5 min to set the timing so why not