I have a VX

[domggg]

Hi hi have a 1994 vx with a little problem i pulled the spark plugs today and found that cylinder 4 spark plug looked like it was running very lean but i figured it was because of lean burn and such then i pulled the rest of the plugs they were all showing signs of runnining rich any ideas on what could be causing this problem?

i thought it might be injectors but it would be weird since 3 cylinders have that problem

could oxygen sensor be causing this problem

Please any ideas or suggestions will help me it doesnt seem like i am getting the mpgs i should be gettin

thanks

[GasSavers_RoadWarrior]

Stuck/clogged injector on #4 maybe

[GasSavers_Ryland]

If you have a fuel problem that is only with one cylender why wouldn't it be that one injector? an easy way to tell is to swap injectors and see if the problem moves.

[domggg]

But then why would the others be showing sighns of burning rich

[GasSavers_RoadWarrior]

Because the O2 sensor sniffs the oxides from the lean cylinder and ECU richens the mixture. Also they'll look rich anyway in winter driving with a lot of sub 30 minute trips.

[Danronian]

Was the plug melted/worn down?

Or was it just discolored?

Does your car smoke at all or take any oil?

I suspect it could be a clogged injector.