well my idle did keep searching until i got the manual ecu in it. now it will go up to 2000 rpm as i'm slowing until i stop. i have the evap code saying its purge valve. any ideas how to fix of test it?
ok so i did do an auto to manual swap and still have the auto ecu in. now as i sit at a light or what ever it idles fine and smooth. as i'm moving and hold the clutch in it will search and as i'm slowing it speeds up the search then comes to a slow rest as i come to a compete stop. some times it wont search but most of the time it will. what can be wrong?
Sounds like an IAC issue. When my IAC was acting up it was not noticeable at idle, but if the car was in neutral and rolling to a stop the RPM's would climb and then slowly fall back to normal once the car came to a full stop.
Pull the IAC, thoroughly clean it with brake cleaner or electric motor spray, and then reinstall it. If the problem persists OHM it out and see if it is within spec.
1999 Eclipse GS Built motor Hahn 16G Turbo w/ FMIC Hahn Stage 5 Portfueler (270's & 500's) Zeitronix Zt-2 wideband w/ 3.5bar MAP 3" SS Turbo Back CM Stage 4 Clutch and Fidanza Flywheel Baer Big Brake Kit
#132868, "RE: weird idle when moving" In response to Reply # 1
Increased idle speed while in motion is normal.
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#132877, "RE: weird idle when moving" In response to Reply # 0
Some "high idle when moving" is normal with an MTX ECU. The ECU will vary the idle based on vss input. 2000RPM is a bit excessive, so you may have a small vacuum leak somewhere.
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#132878, "RE: weird idle when moving" In response to Reply # 4
Originally posted by DarkOne Some "high idle when moving" is normal with an MTX ECU. The ECU will vary the idle based on vss input. 2000RPM is a bit excessive, so you may have a small vacuum leak somewhere.
That, along with the evap code tells me that you may have a vac leak somewhere within the hose that goes to the LDP (evap system).
Captain Caveman
96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq 97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq 98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats 99 OZ 5sp Stocker 15.856 @ 85.97 99 GS stocker auto 17.7@77mph!
#132884, "RE: weird idle when moving" In response to Reply # 6
Originally posted by Dstach thanks guys I've checked the hoses via brake clean but no results.
Just to eliminate it from the mix (since you already have a cel), block off the line going to the Evap crap and see if it helps. Takes two seconds but it will verify quickly.
Captain Caveman
96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq 97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq 98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats 99 OZ 5sp Stocker 15.856 @ 85.97 99 GS stocker auto 17.7@77mph!
#132885, "RE: moving idle more info" In response to Reply # 0
Originally posted by Dstach well my idle did keep searching until i got the manual ecu in it. now it will go up to 2000 rpm as i'm slowing until i stop. i have the evap code saying its purge valve. any ideas how to fix of test it?
i have this excat same issue. Every sensor is new and has been replaced to make sure its not them, EVAP and EGR are removed and deleted, No vaccum leaks, only codes are for EVAP and EGR. I'm completely lost on what it could be. Its an annoying problem.
#132892, "RE: moving idle more info" In response to Reply # 9
Anyone with a boosted 420A throwing an EVAP code should check both the EVAP canister behind the front bumper passenger side opening as well as the fuel vent valve located under the car in front of the gas tank.
Both of these valves are not designed to see boost and the inner diaphragms can tear over time under boosted operation. You can simply replace both EVAP items, or you can replace AND install a one way check valve in the vacuum line to prevent this from ever happening again.
#132976, "RE: moving idle more info" In response to Reply # 11
doubt it. mine is blocked off. i wasn't and i had the problem. blocked it off and no change. ive had headers on since i got my car. had for a week and couldn't drive it and put headers on it so no not headers unless you changed something else
#132977, "RE: moving idle more info" In response to Reply # 12
Well the o2 bung for my header interferes with my radiator fans, so currently i just have my o2 sensor ziptied up till i can get a new bung one welded in. This threw a code, but could it cause my idle to search around 2k then drop slowly?
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