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Hi all, my trusty old van (183,000 miles) registered a P0303 just before smog check. So I pulled plug #3 and it looks fine. Did a cranking compression check--it has 110 lbs in it, others have 120. Changed the plug and wire with the plug/wire from another cylinder. Changed the distributor cap for good measure. It took a week, but still gives me a P0303.
If I pull #3 wire it runs like it has a miss. With the wire connected it runs fine, although I do believe gas mileage (16 mpg city w/ac on) and power might be a bit down. I poured a bottle of Lucas fuel cleaner in it in case it is an injector. It often does take a couple minutes for a noisy tappet to shut up.
It only pulls the P0303. I'd guess cleaning/replacing the injector for #3 would be the next step.
I'm kind of out of ideas. Any suggestions for what might be causing this?
Thanks!
Dan
If I pull #3 wire it runs like it has a miss. With the wire connected it runs fine, although I do believe gas mileage (16 mpg city w/ac on) and power might be a bit down. I poured a bottle of Lucas fuel cleaner in it in case it is an injector. It often does take a couple minutes for a noisy tappet to shut up.
It only pulls the P0303. I'd guess cleaning/replacing the injector for #3 would be the next step.
I'm kind of out of ideas. Any suggestions for what might be causing this?
Thanks!
Dan