MT Photo

Okay, noticed it yesterday.

I'm pretty sure it's a spark plug not firing, but I'm not 100%.

At idle and low RPM's while accelerating the whole car shudders forward and when idling, the idle isn't right.

It sounds lumpy, or just plain wrong.
Don't know how to explain it.

ANY Ideas?

It's driving me nuts.

Also, it idles really really low.

MT Photo

Seriously?...

Curry

iTrader: (1)

Here are a few things you can check/replace:

Clean your IACV
Check/replace plugs as needed
Check timing/distributor
Check plug wires
Check o2 sensors (yes this does affect idle)
Check/replace air filter as needed
Clean your throttle body.
Check your vacuum lines

StiCk3

iTrader: (5)

sounds a little like it is a spark plug...no CELs at all? how long has this been going on? also does it seem to lurch as your going up hill at all? i had this happen a few months back when i pulled my car out of winter hibernation, turned out that a chimpmunk chewed through one of my ignition wires.

MT Photo

I just got a CEL this morning, but due to being OBD1 I have no idea what code it's throwing.

I bet anything it's ignition.

New spark plugs on monday.

StiCk3

iTrader: (5)

how to pull and read the codes for OBD1

http://soarercentral.com/sc-forum/me.../1113/862.html

nuff said

MT Photo

Yikes....

I feel so lost looking at this, but thanks.

TXES300

I have the same issue. It only does it when I am at idle and about 1/2 throttle. I get some kind of hesitation. If I am at WOT it seems to be fine even though I think it should be faster... does your exhaust sound choppy too?

qksl2

Adjust your TPS and new plugs/wires. Do you have water in your plug valley?

Ian

xxtoobsxx

iTrader: (4)

Wow same thing to me on my 94 sc4. Mine only does it once in a while. It sounds like crap...like a v8+subaru. I let it idle and it goes away and if i try to drive it has no power then goes away...almost like on my old muscle when the carb gets flooded. So now i got this and a failing waterpump. Anyone in san diego wanna help me out?

socal300

Maybe theres water in the cap and rotor just a thought happend to mine and I had the same problems...

breakb

iTrader: (2)

mine would hesitate and i changed spark plugs and wires. if that doesn't work. maybe MAF? cuz i had no CEL but had it checked out anyways, and the MAF was throwing a code. take it to like a checkers or sumtin and have it read.

peace out

JspecSC3

iTrader: (4)

Sounds like ignition or vacuum. Have you pulled the code yet?

JspecSC3

iTrader: (4)

How do you check for MIL blinks? Wouldn't you need a digital Soarer cluster for this?

1uzsupra

If you don't have a Check Engine light on the dash, you can always hook up an LED to the 'W' connection on the ECU and read the codes blinked from it. Since I am doing a transplant of the 1UZFE into an older '87 Supra, this has been a life saver in trying to track down the problems in hybridizing the wire harness. Currently trying to track down 14, 15, 22, 24, 41, and 47 at the moment, lol.