knock sensor?
Thread Starter
|
Freshman User
Joined: Sep 2006
Posts: 33
Likes: 0
From: Texas
knock sensor?
Hello fellow ford truckers, I have a 1994 Ford F150 XLT 302 5.0L automatic truck. Where exactly is the knock sensor located? I still am having pinging problems after changing spark plugs, wires, cap and rotor, doing the seafoam thing <---(Not much smoke at all), changing the egr valve with a new one, and timing on 10degrees. Any clues on whats going on... It is smooth on acceleration, but with pinging on part throttle/full throttle.
Senior User
Joined: Aug 2007
Posts: 110
Likes: 1
From: bellevue, washington
one problem you might have is are you pulling the spout connector before you time it? if its pinging at 10degrees then you have some pretty bad gas, i run mine at 12degrees advance and have no pinging issues
hers some dirrections http://fordfuelinjection.com/?p=71 your spout connector is on or near the distributeri think
hers some dirrections http://fordfuelinjection.com/?p=71 your spout connector is on or near the distributeri think
Thread Starter
|
Freshman User
Joined: Sep 2006
Posts: 33
Likes: 0
From: Texas
yeah, i have spout off when i check the timing... I have not gone below specs or below 10deg. Years ago, i used to run it on 14deg and it ran great. Now it pings at 10deg after changing/checking everything.
Junior User
Joined: Mar 2003
Posts: 98
Likes: 0
i wonder if your solenoid that allows the EGR to operate is bad . Run the vacuum right to the EGR .... bypassing the solenoid , and let us know if that cures the pinging .
The solenoids job is to shut off the EGR when the engines cold . It might be keeping it off .
The solenoids job is to shut off the EGR when the engines cold . It might be keeping it off .
Thread Starter
|
Freshman User
Joined: Sep 2006
Posts: 33
Likes: 0
From: Texas
EGR vacuum hose....where does it lead to? It runs behind my intake and i'm not sure where it leads to. Thanks
Trending Topics
Junior User
Joined: Mar 2003
Posts: 98
Likes: 0
follow the vac hose to the solenoid ..... pull the 2 hoses off it and connect them together with a connector . No harm in this whatsoever .
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
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
You shouldn't run direct vacuum to the EGR valve unless you want the engine to run terribly and lose a lot of power. The EGR vacuum supply is controlled by the computer via a valve mounted above the driver side valve cover -- it's not an on/off temperature switch. Running direct vacuum also will not tell you anything about the source of the pinging. If running the EGR valve wide open does not cure pinging, something is really wrong, so there's not a lot to learn from that exercise.
Check fuel pressure, and if you happen to have a mass air truck, try cleaning the mass airflow meter. The wires inside can get dirty and send a signal corresponding to a lower mass flow value than is actually entering the engine, causing a lean condition and timing more advanced than it would be for the correct air flow.
Here is a picture of the knock sensor location:
Check fuel pressure, and if you happen to have a mass air truck, try cleaning the mass airflow meter. The wires inside can get dirty and send a signal corresponding to a lower mass flow value than is actually entering the engine, causing a lean condition and timing more advanced than it would be for the correct air flow.
Here is a picture of the knock sensor location:
Junior User
Joined: Mar 2003
Posts: 98
Likes: 0
Originally Posted by EPNCSU2006
You shouldn't run direct vacuum to the EGR valve unless you want the engine to run terribly and lose a lot of power. The EGR vacuum supply is controlled by the computer via a valve mounted above the driver side valve cover -- it's not an on/off temperature switch. Running direct vacuum also will not tell you anything about the source of the pinging.
Yeah you cant connect those 2 hoses .
Originally Posted by EPNCSU2006
Check fuel pressure, and if you happen to have a mass air truck, try cleaning the mass airflow meter.
Here is a picture of the knock sensor location
No wait .... let me think .
Last edited by Musclestang; Oct 1, 2007 at 08:28 PM.
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
It's MUCH easier to get to if you pull the plenum off. Knock sensors rarely go bad though.
The EGR system should throw a code if it's not working right. Have you checked for codes?
One other thing to check is your plug wire routing, and use good high quality wires. I prefer Ford Racing or Motorcraft. These are made to fit right too. Make sure they're routed exactly like the sticker says.
The EGR system should throw a code if it's not working right. Have you checked for codes?
One other thing to check is your plug wire routing, and use good high quality wires. I prefer Ford Racing or Motorcraft. These are made to fit right too. Make sure they're routed exactly like the sticker says.
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
Originally Posted by Musclestang
Umm ..... if you paid attention in Fuel inj Class like I did .... you would know that on a Mass Air Flow truck ... there is NO KNOCK SENSOR . So he obviously has speed density ... No MAF .
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
You probably do. Look way back behind the plenum towards the passenger side for a black two wire connector (looks like the ECT and IAT connectors). You can also see it by crawling underneath and getting at just the right angle.