95 Rav4 Misfire/ Hesitation

[supraneil]

My 95 Rav4 petrol with manual transmission has developed what can only be described as a misfire/ hesitation at 3000rpm, hot or cold, however sometimes after i have given it a good thrashing it goes away for a while.

I have changed the plugs for new NGK ones, leads for 2nd hand (apparent good ones)and the coolant temp sensor (advised by toyota mechanic)

I have only really noticed it after i had the whole exhaust changed (minus cat)

I also checked the fault codes and it said it was running lean (can't remember the exact code :( )

Any ideas? i was thinking maybe a new 02 sensor?

Thanks neil.

[bothwell_buyer]

Welcome to the forum.

Have you checked theres no air intake leak anywhere?

Petrol filter ??

[supraneil]

Hi.

I was actually thinking it could be the petrol filter, as i have to do the one on the supra next week i might as well do the Rav at the same time.

[bothwell_buyer]

Just that one of the probs found on my number 2 RAV was thick muck in the filter recently....given the age of the tank etc I don't suppose its surprising. Its running a different engine, but had a misfire around 3500rpm.

[supraneil]

Sorry to bump this, i have been driving the rav alot more now and the misfire/ hesitation happens at around 1800-2500rpm and only when cold, once its warm it literally jumps forward and everything is fine.

Any ideas (still not changed fuel filter yet)

[Smiler AS]

Would check gaps on the spark plugs, one may have been accidentally knocked and closed/widened gap on one of the plugs.