fuel filter???
Thread Starter
|
New User
Joined: Dec 2008
Posts: 11
Likes: 0
fuel filter???
i have a 300 inline 6 with about a 190000 miles on it. just today it started bogging down horribly and it seems to me like its only runnin on a couple of the cylinders but thats just how it seems from the lack of power it is producing. is there any way it could be as simple as the fuel filter? or a possibly a chip that i have in it. its an old jet performance chip. maybe a distributor problem? i recently replaced it as well but it was timed and running fine. just not smoothly running by any means.
Post Fiend
Joined: Jan 2005
Posts: 8,402
Likes: 10
It would certainly be worth fitting new fuel filter anyway, Also check for restricted exhaust flow. May also be worth checking for any stored error codes and for fuel pressure. Could also be a leaking EGR valve.
Post Fiend
Joined: May 2004
Posts: 11,289
Likes: 6
From: Lakewood, Ohio
the fuel filter rarely is the problem but should be changed regardless.
it has to be really clogged to prevent fuel from getting to the motor.
i would start at that chip and check plugs and other tuneup parts.
it has to be really clogged to prevent fuel from getting to the motor.
i would start at that chip and check plugs and other tuneup parts.
Thread Starter
|
New User
Joined: Dec 2008
Posts: 11
Likes: 0
its been less than 6months since I've replaced plugs, wires, distributor cap and even distributor. and comp is not throwing any codes.
Trending Topics
Posting Guru
Joined: Jan 2004
Posts: 2,403
Likes: 4
From: Charlestown, RI
Not trying to sound like a jerk here, but you're all over the place with "what ifs".
Many times it's basics, as quicklook suggested. Even if the parts are only 6 months old, it doesn't hurt to check them anyway. I've seen cases of cracked plug insulators that didn't show up until a few months later...
Personally, I would disconnect the battery, take the chip out, reconnect the battery and see what happens.
Many times it's basics, as quicklook suggested. Even if the parts are only 6 months old, it doesn't hurt to check them anyway. I've seen cases of cracked plug insulators that didn't show up until a few months later...
Personally, I would disconnect the battery, take the chip out, reconnect the battery and see what happens.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Post Fiend
Joined: May 2004
Posts: 11,289
Likes: 6
From: Lakewood, Ohio
what brand rotor/cap?
wires are how old? what brand?
new parts can fail from any brand.
pull plugs and read them.
even with light off you could have a code.
Post Fiend
Joined: Jan 2005
Posts: 8,402
Likes: 10
As for the EGR valve pull the vacuum pipe and plug the end of the pipe, does that make any difference? If not you need to apply some vacuum to the EGR valve, either with a vacuum pump or from a vacuum source on the engine. When you apply vacuum does the engine note change? If it does then EGR probably OK, if not then either the valve is stuck open or the diaphram is leaking.
Or you could just pull the EGR valve, clean it and make sure it is seating properly when you re-fit it.
While you are at it pull the vacuum pipe off the fuel pressure regulator and see if there any signs of gas at the pipe, if there are replace the FPR.