Idle problem

[Merlin]

When the ignition timing was set was the service connector shorted? If not that may have contributed to the issues.

whats service connector? and they did just turn distributor to set rpm's

In that case it sounds like the ignition timing hasn't been properly set. This may be the cause of your over fuelling symptoms if the timing is too retarded. You need to jump the service connector (the little blue two pin plug under the radio) to set the timing. By shorting the service connector and starting the engine it stops the ECU from adjusting the ignition timing. If you didn't do this the ECU will be compensating for any adjustments that were made and base ignition timing will be off.

Hopefully it is just a spark plug / lead issue but your timing will need properly reset.

[jonja]

Thanks merlin

I completley forgot to mention,
My rpms were fine before i fitted bigger spark leads, after i fitted spark leads and changed spark plugs it was bubling all the time, so than we started to mess with distributor . And it got better a little bit , so thats why i thought about ignition

[jonja]

Problem solved it was spark plugs

[vanzep]

yep avoid bosch plugs - ngk or denso are the only real options
glad u got it sorted