93' Celica with a Rough Idol

[WiLd_ThAnG]

Hey Guys, I have a 93' Celica. When I start it up, it often idols somewhat rough and has quite a bad vibration either hot or cold, however, it doesn't always do it. It usually idles at around 900 RPM, but the tacho can tend to bounce around a bit. However once the car is going, it's no problem. It runs like a new car, it has power, it's responsive, I can find it a little heavy on fuel but it runs fine though.

Now so far, the following has been replaced:

- ECU

- Spark Plugs

- Spark Plug Leads

- All the fuses

- PVC Valve

- Alternator

- The injectors have been taken out and cleaned

- The clutch

- The throttle body has been cleaned out

- MAP sensor

- Cat Back stainless steel exhaust system

And god only knows what else. To me, it feels like a miss fire. I'll take a video next time I cold start it and see if it does it. (which it most likely will)

Any ideas guys? Thanks :)

[trentmeyer23]

*idle

Are all vacuum hoses in good order? A perished or disconnected hose can cause rough idling.

[WiLd_ThAnG]

Yeah they all look perfect. I know the car has had a history of running a bit rough and a bit rich. It's got me quite stumped..