Engine stumbles on acceleration
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Senior User
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From: Liverpool, NY
Engine stumbles on acceleration
I just finished changing all my plugs (see the following thread: https://www.ford-trucks.com/forums/s...d.php?t=241380 )
Anyway, when the car is idling, the engine is nice and smooth. When I accelerate, it begins to stumble a little. If I press harder on the gas, it smooths out. I know that before I changed the plugs I was getting an O2 sensor code. I haven't gotten any codes yet. Could the stumbling be an O2 sensor related issue?
Keith
Anyway, when the car is idling, the engine is nice and smooth. When I accelerate, it begins to stumble a little. If I press harder on the gas, it smooths out. I know that before I changed the plugs I was getting an O2 sensor code. I haven't gotten any codes yet. Could the stumbling be an O2 sensor related issue?
Keith
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From: Liverpool, NY
Well, I looked under the hood a little while ago. I did look quickly, but I couldn't find any disconnected vacuum hoses. All of this started after I changed out the spark plugs. I installed Bosch Platinums. The Expy will drive ok up to about 55-60mph. After that, any further acceleration will cause stumbling. I get the same type of stumbling when driving up a hill. I'm not sure where to go from here.
Keith
Keith
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From: All over Texas
Originally Posted by KeithE524
I installed Bosch Platinums.
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Senior User
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From: Liverpool, NY
If it could possibly be the Bosh Platinums (not +2 or +4), what plugs should I put in?
I am really not looking forward to another plug change.
Keith
I am really not looking forward to another plug change.
Keith
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While I have yet to get to plug changes, I have read other threads here about how bad this get with the Bosch plugs...........and everyone who has gone this route has returned to the Autolite plugs that came in these things originally.
Good Luck to ya.
Good Luck to ya.
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From: Liverpool, NY
I looked in the trash to see exactly what plugs I removed. They were Autolite 103's, which were working pretty well, just an occasional miss, which I believe were caused by COP #3 which I replaced during this spark plug change. Should I go back to the Autolite 103's or the APP103? The 103's are resistor plugs and the APP103's are double platinum.
Keith
Keith
Last edited by KeithE524; May 21, 2004 at 02:39 PM.
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From: Liverpool, NY
I have 101,500 miles. I removed Autolite 103's not AP103's or APP103's. According to the AutoZone and Autolite websites, all the above are compatible, with the APP103 being the OE style.
Keith
Keith
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From: All over Texas
I'm not 100% sure that Autolites are equivalent to Motorcrafts (Autolite may make and then badge with Motorcraft's name). To be safe, I'm only installing Motorcraft plugs in mine when the time comes (soon).