Poor Idle when put in gear

[robnstac]

I just bought a 94 eclipse GS with A/T ,2.0. At first the car would die when put in gear or the A/C was turned on(even in park). I replaced the ISC, sprayed throttle body cleaner in it, the air filter is clean and it has new plugs and wires. After changing these items the car will now stay running with the a/c on(in park).

New problem the car now idles in park at 1,000 - 1,200 rpm (I have adjusted the BISS to increase the idle but it still wants to stall), when the a/c is kicked on it drops to 750 rpm when in park. When you put it in gear the engine drops to 500 rpm and wants to stall, it does not stall but it idles extremely rough. Also with nothing on, in park the rpms will surge up and down.

I have run a bottle of fuel injector cleaner through but no change.

Also it seems that the car is getting poor fuel economy. 95 miles(1/2 on highway and 1/2 in town) and have used a 1/2 tank of gas. When I smell the exhaust it seems to be runnig a little rich, but I'm not an expert.

Once you get the car upto speed the car runs GREAT!! Except when you come to a stop, with or without the a/c running, it wants to stall.

Any suggestions?? Love my car but this is driving me nuts!!!!!!
Rob

 

[stalnout]

I have change my filter on a 90 fwd eclipse, but after changing it my idle is jumping up n down frm 700 to 500 rpm then it will automatically stall on its own even if i just leave it there sitting and sometimes when im waiting for the green light.What should i do ? i have made sure the clip for the filter is tight making sure its holding on good and making sure theres no leak. it gets ignorin when you driving then alll of a sudden its stals on its on. and i end up sitting there n keep on restarting the car.

 

[xcelr8n]

I will be honest when I say I know nothing about the A/T on these cars, but I'd still suspect its a BISS adjustment issue or something of that nature.

 

[Shadowofoblivio]

it possibly could be something along the lines of low trans fluid or line pressure making it not keep the clutch packs apart, could be the TC lockup is failing or failed, it could be any of the wondrous TB sensors. just go through and check some of the obvious stuff first.

 

[stalnout]

it possibly could be something along the lines of low trans fluid or line pressure making it not keep the clutch packs apart, could be the TC lockup is failing or failed, it could be any of the wondrous TB sensors. just go through and check some of the obvious stuff first.

Would u happen to think it could be my MAF sensor ?

 

[rEclipserGST]

Ive been having idle troubles also. My car only has about 89,000 miles on it.

i have a Blitz Boost Controller and a Apexi Fuel Controller on the way.
Im also gettin 450cc injectors.

Should any of this help me with idle? It bounces from 200-500 rmps. It stalls out frequently. Any Suggestions??

thanx

 

[kahl23]

Ive been having idle troubles also. My car only has about 89,000 miles on it.

i have a Blitz Boost Controller and a Apexi Fuel Controller on the way.
Im also gettin 450cc injectors.

Should any of this help me with idle? It bounces from 200-500 rmps. It stalls out frequently. Any Suggestions??

thanx

1st off if you have a 95 GST you should already have 450s. Is the boost controller already installed? Easy fix would be a vacuum leak in the lines. Also, try adjusting the idle speed up a little and see if that helps.

 

[rEclipserGST]

niice, ive been tryin to figure out what stock injectors were, for sum reason Mits dealers and auto parts stores couldnt tell me the stock cc's. But what size injectors shuld i upgrade to? And ive adjusted the the idle screw under the hood. But that doesnt seem to help.

The car idles fine in Park and Neutral. Once it goes into a gear... its a done deal. Acceleration is slow at first. But once it gets above 25 mph... its good.

A shop told me 3 out of 4 of my injectors are bad. So im lookin to upgrade them.

 

[kahl23]

niice, ive been tryin to figure out what stock injectors were, for sum reason Mits dealers and auto parts stores couldnt tell me the stock cc's. But what size injectors shuld i upgrade to? And ive adjusted the the idle screw under the hood. But that doesnt seem to help.

The car idles fine in Park and Neutral. Once it goes into a gear... its a done deal. Acceleration is slow at first. But once it gets above 25 mph... its good.

A shop told me 3 out of 4 of my injectors are bad. So im lookin to upgrade them.

OK well bad injectors may or may not be your problem right there. Looking through your profile it looks like you're still on the T-25. What size injectors you use is really dependent on what your goals are and how capable your fuel management is. What are your goals? And also I'm afraid I'm not that familiar with the Apex'i FC, maybe someone else on the boards is, sorry.

 

[kahl23]

I just realized I never fully answered your question. It sounds like it may be a problem with your torque converter. Never having intimately dealt with the DSM A/T, I really couldn't tell you what exactly it is, but if its fine in neutral and park, but only becomes an issue under load, then it sounds like your problem is the converter. You should also try changing out the transmission fluid. Make sure you use whatever fluid the manual recommends, nothing fancy or exotic. Stick to stock for now.
Also, considering your lack of experience with modifications, don't go with bigger injectors until you decide it's time to upgrade your turbo. Adding new injectors will just throw another variable into the mix. For right now, save yourself some money and look through the marketplace for stock injectors. Enough guys buy new injectors that you're bound to find someone with a set of stockers lying around. I might actually have mine somewhere, but I won't be home until next week so don't rely on me to hook you up.
Above all else, remember as you progress down the tuning path that you need three things for an engine to run: air, fuel and spark. The stock ignition system on the 4G63 is just fine, so don't worry about that except maybe for some better spark plugs and spark plug wires. As for fuel and air, don't upgrade one without the other. In other words, buying bigger injectors will throw more fuel into the cylinders, but there won't be air to combust the extra fuel, leaving you with no additional power (frankly probably less power), poor gas millage and even worse emissions. There are performance upgrade paths on the site, follow them! I hate it when guys waste money on modifications they don't need. Spend the money where it counts to get that thing moving faster.

 

[rEclipserGST]

okay, i got you. Im def. going to talk this over with my freinds. But you said something about Air, Fuel, and Spark... i have a Boost controller... so thats air rite? Then i just got the Fuel Controller.... thats fuel. And spark.... i have Top brand spark plugs and wires. So0o0o, do u think it culd be a boost leak? And getting bigger injectors wont be as bad if i can control the amount of fuel through the Fuel Controller correct?? Thanx for all the help.

 

[kahl23]

Well, it doesn't sound like a boost leak to me, because I have to assume that you aren't boosting anything while idling at a stop. If, however, one of the vacuum sources has a leak in it, that could be causing un-metered air to be flowing into the engine, which might be causing your problems. To answer your fuel questions, yes you can control the amount of fuel you run with the FC, but after a certain injector size I think that it will probably be too much, what that size would be on the Apex'i unit...I don't know. If you plan on keeping the T-25 and maxing that out, you should check to see what size injectors are necessary, same goes for any new turbo you want, search the forums, find the necessary supporting mods, get them, then upgrade. As far as your problems now go, it might be better if you just solved these problems now and get the car running right. If you go and buy a new turbo, new injectors, etc, and the problem persists, it could be something to do with the new parts or some underlying problem that was never fixed. My $0.02 is that you find a set of stock injectors on the cheap, install them, and see if that doesn't fix your problems. If that doesn't do it, look into what I said about the A/T.

 

[rEclipserGST]

Okay, i replaced the injectors and the car ran exactly the same. The idle still fluxuiated when in gear. But the Park/Neutral stayed around 1000 rpms.
The injectors are 450's and we installed the Apexi SAFC. The car was Drivable yesterday. But 2day.... the car keeps wanting to stall. Once i leave it in gear... after about a minute, it stalls out. I do not have a logger, but im gettin one ASAP. My issue is the car would drive with a rough idle BEFORE we replaced the Injectors. Im just curoius if anyone can tell me which sensor to use.... Hot Wire, Flap, Karmen, or Pressure. Ive read many different forums, threads and posts and i usually see Karmen or Pressure sensor being used. I have stock fuel pump, injectors, and regulator. I just want the car to idle fine. Then i will get the fuel mods.

I've been reading alot, and i think it might have to do with the Idle Speed Control. Possibly the coils went bad? Any Opinions?? Thank you in advance.

 

[bobby180360]

Check the o2 sensors, i have the same problem with mine, i put a scan tool on it and realized i had no voltage at my downstream o2, so check that, it could be a possibility.

 

[rEclipserGST]

My 02 sensor was bad, but we replaced it about 3 months ago. Is it possible it could be bad again? Or boost leaks?

 

[bobby180360]

Do a test on both it is possible.

 

[rEclipserGST]

My car keeps stallin ever since i replaced the injectors and installed the Apexi SAFC. IDK WHY! its doing this! Im anxoius to know how my car was running with poor idle but now it isnt going to move out of my driveway. Please, i need answers!

 

[bobby180360]

did you ohm out your tps yet that was the first thing i was told to do.

 

[rEclipserGST]

i took it to a shop, they said it was the timing. it was off by 40 degrees..... wth!! cost me 300 dollars to fix. Btw, my car runs a bit slower. my friends and i did sum test runs.... and i can not hang with the hondas anymore. Why is that?