CEL on
Thread Starter
|
Elder User
Joined: Dec 2006
Posts: 830
Likes: 0
From: Kitchener,Ontario,Canada
CEL on
P0306. Came on this morning, noticed a SLIGHT hesitation as I pulled away.
Bosch platinums almost 60,000 kms, I was hoping to get another year, but hey I got almost 3 out of them!
Guess I get to put in Autolites or Ford plugs now. Should do the leads too, although I did do them when the plugs were done, bad leads might do the same thing. I'm hopeful that there is nothing else wrong, otherwise the Vulcan engine runs like a clock. Warmed up under full load there is no misfire, only appears from morning cold start.
Kinda glad it is not something too expensive. I was quite surprised that the ECU could sense that small of a misfire. It could only be felt for about 2-3 seconds while pulling away cold. As soon as the engine has partly warmed up, it smooths out completely.
Aeroman.
Bosch platinums almost 60,000 kms, I was hoping to get another year, but hey I got almost 3 out of them!
Guess I get to put in Autolites or Ford plugs now. Should do the leads too, although I did do them when the plugs were done, bad leads might do the same thing. I'm hopeful that there is nothing else wrong, otherwise the Vulcan engine runs like a clock. Warmed up under full load there is no misfire, only appears from morning cold start.
Kinda glad it is not something too expensive. I was quite surprised that the ECU could sense that small of a misfire. It could only be felt for about 2-3 seconds while pulling away cold. As soon as the engine has partly warmed up, it smooths out completely.
Aeroman.
Lead Driver
Joined: Sep 2003
Posts: 7,015
Likes: 208
From: SoCal
Didn't you just show us some 300KM plugs that had about 0.1" gaps? How did they run?
The point is, with the high voltage ignition system used in the Aerostar, it's pretty hard for the plug itself to misfire. More likely something else causing it, like the wires, or insulation on the coil pack.
The point is, with the high voltage ignition system used in the Aerostar, it's pretty hard for the plug itself to misfire. More likely something else causing it, like the wires, or insulation on the coil pack.
Fleet Mechanic
Joined: Mar 2004
Posts: 1,529
Likes: 35
From: Kansas
Any of you ever see some of those "surface gap" plugs that some marine engines use? That's what some of these looked like.
I guess that just proves that the original Motorcraft plugs are pretty good.
Thread Starter
|
Elder User
Joined: Dec 2006
Posts: 830
Likes: 0
From: Kitchener,Ontario,Canada
Didn't you just show us some 300KM plugs that had about 0.1" gaps? How did they run?
The point is, with the high voltage ignition system used in the Aerostar, it's pretty hard for the plug itself to misfire. More likely something else causing it, like the wires, or insulation on the coil pack.
The point is, with the high voltage ignition system used in the Aerostar, it's pretty hard for the plug itself to misfire. More likely something else causing it, like the wires, or insulation on the coil pack.
Another point, does not matter how high the ignition system voltage is, if the spark does not jump across the electrode gap, engine will misfire. Maybe some debris build up or a failed plug even.
Aeroman.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
don't forget the fuel injector and it's wiring
the OBDII 3L is SFI
if the plugs and ign. wire looks fine, run a bottle of Regane Concentrate or Large Veh. or the expensive Chevron Techron Plus, contains polyetheramine, the best injector cleaner on the market.
most gasoline bulk operator wholesalers have cut back on the cleaning additives to the bare minimum or less to meet gov. specs because of low wholesaler margins
may have also got a tank of contaminated gas. diesel contamination is common
the OBDII 3L is SFI
if the plugs and ign. wire looks fine, run a bottle of Regane Concentrate or Large Veh. or the expensive Chevron Techron Plus, contains polyetheramine, the best injector cleaner on the market.
most gasoline bulk operator wholesalers have cut back on the cleaning additives to the bare minimum or less to meet gov. specs because of low wholesaler margins
may have also got a tank of contaminated gas. diesel contamination is common
Thread Starter
|
Elder User
Joined: Dec 2006
Posts: 830
Likes: 0
From: Kitchener,Ontario,Canada
Seems to have cleared the misfire.
Well I've cleared the CEL, filled the tank with new gas put a bottle of Inj cleaner into the tank & so far no misfire. However this did occur with the terrible wet & thunderstormy weather which has been hanging around Ontario now for about a month or more. Even the grass is perfectly green ! I'm thinking bad condensation or other wetness throughout the entire ignition circuit could have caused such a problem somewhere? I even had the inside of the vehicle steam up when the sun came out! (The van never smells wet or musty).
Fingers crossed!
Aeroman
Fingers crossed!
Aeroman
Thread
Thread Starter
Forum
Replies
Last Post
Nyquil Junkie
1983 - 2012 Ranger & B-Series
30
Feb 11, 2016 09:31 PM
