engine idles rough when when i go through auto car wash
05-16-2018, 12:39 AM
#1
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engine idles rough when when i go through auto car wash
1999 f 150 4.2 l
whenever i drive through an automatic car wash or through a big puddle, my engine feels like it is going to cut out. any ideas
whenever i drive through an automatic car wash or through a big puddle, my engine feels like it is going to cut out. any ideas
06-01-2018, 10:17 PM
#2
Junior Member
Coil pack cracked or perhaps spark plugs/wires. I've had this on all 3 4.2 trucks I currently own and drive lol. Use a spray bottle from Windex or something and fill it with plain water. Run the engine and spray the coil pack on passenger side valve cover. If it bucks and shakes the engine and misses then it's the coil, if not, get in and spray the sparkplugs lightly. They shouldn't really arc unless you're underwater or have bad boots.
My two cents.
My two cents.
06-30-2018, 09:39 PM
#3
How's she goin' eh?
I had a VW golf that did this. Turns out it was a bad ground on a fuel rail. Look into that too. My mechanic found it after a very small fire and had to rebuild half the wiring in the engine bay.
