 Rough Idle in gear 1994 Celica ST (automatic) |
 Jul 7, 2014 - 11:57 PM
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Enthusiast  Joined Jul 1, '14 From Hawaii Currently Offline Reputation: 3 (100%)  |
So i have purchased a 1994 Toyota Celica ST Hatchback (Automatic) from a friend a week ago, but he's not available now since he moved to another country (which is why he sold it to me). Ive always been into Celica's but never owned one.
Now that i have it, I'm having an issue with a low idle while in anything except park or neutral. Also, this problem does not happen once i start the car. When i start the car, it will run fine and idle at about or a bit under 1K RPM whether in park, reverse, neutral, drive etc... But once i start driving and bring the RPM above 2k, when i stop and idle again, the RPM drop to around 400-600 (sometimes even lower) and the car shakes when its around this rpm and then smooths out when the RPM gets above 2k Any idea what the issue with this could be? I would really love to get this car running well again like when i drove it a year ago or so and it was awesome! There is a short ram intake on the car. But i don't remember if it was on when i drove it a year ago, i don't know if the intake could cause this problem. It has no brand that i can see, so i can add pictures if you would like. Thank you all so much in advance!! |
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Replies
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Jul 14, 2014 - 1:38 AM
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Enthusiast Joined Jul 1, '14 From Hawaii Currently Offline Reputation: 3 (100%) |
Just gapped by spark plugs and cleaned the IAC and my car is running a bit high now. In park I'm at about 1050 RPM and in gear now its at about 900, When the AC is on, my RPM goes up about 100 then down 100 from the original idle RPM then goes back up to the regular RPM.
So the screw that adjusts the resting point of the throttle plate should be completely blocking air off correct? and the only air should be through the IAC? |
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Jul 16, 2014 - 4:44 AM
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 Enthusiast Joined Sep 23, '12 From Australia Currently Offline Reputation: 4 (100%) |
QUOTE (Noahwhite2014 @ Jul 14, 2014 - 2:38 AM)  Just gapped by spark plugs and cleaned the IAC and my car is running a bit high now. In park I'm at about 1050 RPM and in gear now its at about 900, When the AC is on, my RPM goes up about 100 then down 100 from the original idle RPM then goes back up to the regular RPM. So the screw that adjusts the resting point of the throttle plate should be completely blocking air off correct? and the only air should be through the IAC? Those figure sound normal, that's what mine runs at when idling alright. Mine still shakes like crazy thought lol --------------------  ------------------------------| White '94 Celica | Bought 11/05/12 | Sold 12/05/15 |------------------------------ |
Posts in this topic
Noahwhite2014 Rough Idle in gear 1994 Celica ST (automatic) Jul 7, 2014 - 11:57 PM
enderswift I've seen this issue before. The egr valve mig... Jul 8, 2014 - 8:34 AM Noahwhite2014 Im actually really new to this. So i was wondering... Jul 9, 2014 - 4:11 AM Noahwhite2014 Sorry for being so nebbish. Explored my engine bay... Jul 11, 2014 - 10:26 PM Special_Edy The pipe just runs down to an exhaust port in the ... Jul 12, 2014 - 4:04 AM
Noahwhite2014 QUOTE (Special_Edy @ Jul 12, 2014 - 4... Jul 12, 2014 - 5:07 AM rentaspace My car does this too, in fact sometimes it's s... Jul 12, 2014 - 5:13 AM Special_Edy Unplug the efi fuse or disconnect the battery for ... Jul 12, 2014 - 11:12 AM Noahwhite2014 QUOTE (rentaspace @ Jul 12, 2014 - 6... Jul 12, 2014 - 2:08 PM rentaspace Idle air control valve is what solved my air con p... Jul 13, 2014 - 5:51 AM Noahwhite2014 So I've let the computer reset at what not wit... Jul 13, 2014 - 7:36 PM rentaspace QUOTE (Noahwhite2014 @ Jul 13, 2014 - 8... Jul 14, 2014 - 12:54 AM rapid36 QUOTE (rentaspace @ Jul 14, 2014 - 1... Sep 23, 2014 - 5:08 PM blockustomz I had this problem on my 1.8 190k manual. It turne... Sep 23, 2014 - 5:40 PM Noahwhite2014 QUOTE (blockustomz @ Sep 23, 2014 - 5... Sep 23, 2014 - 9:20 PM blockustomz QUOTE (Noahwhite2014 @ Sep 23, 2014 - 10... Sep 26, 2014 - 11:07 AM |
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