erratic idling on 306

[jmclk]

have a problem with erratic idling on my 98 306 merridian. idles between 900-1500 constanly up and down .

can anybody help i heard it could be the stepper motor but cannot find it??????

 

[blackknight]

hi ..engine size 14/18/20 fule type?????...the more info the better the help lots of crys for help in here with no info..... hard to explane were it is so just follow wires that goes to intake your find it but before you go buying a part to sort this prob any one of the sensors could make car act up like this could be air filter /vacuum leak/faulty gapped spark plugs/timing belt could replace parts and still have prob and an empty pocket..so get it hooked up to a comp and find out for sure cos no way of repairing steppers or sensor parts all sealed units so why take them out if your not sure if its at fult as all sensors linked to ecu and car will not run right minus a sensor so cant really repair car by elimanation

 

[jmclk]

hi the engine is a 1.6 multi point injection i had a look for the stepper motor i found thr pontimeter and a sensor that goes into the under side of the throttle linkage but goes into a blank (doesnt actually go threw to the inside)but still cannot find stepper motor .

i heard it could be clean with brake cleaner may solve the problem just thought i give every thing a good clean before having to spend a small fortune

 

[blackknight]

hi ..look again it's there on the throttle housing assembly near the pontimeter maybe even that so called sensor you found could be it cant think of any sensor that should be there ... the stepper is the idle speed controler and doesnt need to go threw throttle housing just needs small hole very small so maybe you didnt see it or hole blocked ??? and o yeah make sure you use a little wd40 after brake cleaner because brake cleaner will dry out stepper and it may stick

 

[jmclk]

the one that i took off was under the pontimeter and was held in by one screw when it came out it was a brass piston very clean brass piston mounted on a spring the recess it went into was also very clean but there was no hole going threw into the throttle housing i thought to myself at the time thats pointless it doesnt do anything unless it heats up

it also has a rubber seal on it

i took the trottle housing off but there was not a hole connecting, that what make me think its not stepper motor

i was expecting it to be carboned up

 

[blackknight]

all i can say then is buy a haynes manual on your car will show you were to find it...or ask at a peugeot dealers