Chirp noise while accelerating
Thread Starter
|
6th Gear
Joined: Feb 2024
Posts: 6
Likes: 0
Chirp noise while accelerating
I have a 1992 f350 dually with a 7.3 idi. I have done tons of work refreshing the engine bay as well as all suspension, bearings, and joints and bushings replaced. I have a chirp or squeak while the engine is running after it warms up. Slow chirp at idle and picks up with rpms. Noticable chirp at 1500rpm and unbearable at 2000 rpm or higher. Don't notice any lag in acceleration or issues shifting. I've already replaced tensioner pulley, new belts, new power steering pump and gearbox, new alternator. Only thing that hasn't been replaced is vacuum pump and ac pump. It sounds like it's coming from the throttle body/ air intake filter. Put a screw driver up to my ear and made contact with every point I thought the noise was coming from and still can't locate. Anyone had any experience with this?
Ol girl only has 170000 miles and since my possession 2 years ago it has had plenty of on time and early maintenance. Very well taken care of and driven daily, not driven hard at all. Most I tow with it is 13,000 lbs on the goose every so often
Ol girl only has 170000 miles and since my possession 2 years ago it has had plenty of on time and early maintenance. Very well taken care of and driven daily, not driven hard at all. Most I tow with it is 13,000 lbs on the goose every so often
Last edited by BIGRED101; Feb 24, 2024 at 04:42 PM.
Thread Starter
|
6th Gear
Joined: Feb 2024
Posts: 6
Likes: 0
Pulled belt and ran it, no squeak. Inspected my pulleys, tensioner feels great, belt looks perfect, idler, crank and alternator are good. Power steering feels like normal play, it's only a couple months old so I think that's fine. Ac/idler feels like it's worn and the vacuum pump has a slight low squeak when it's turned over. I'm thinking either one is the culprit. They are the original parts on it when I bought it and the only one that I haven't replaced yet. So might as well just do them both at once. Thank you for the help!
Trending Topics
Mountain Pass
Joined: Dec 2023
Posts: 163
Likes: 36
From: Tennessee
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
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
Logistics Pro
Joined: Nov 2013
Posts: 3,922
Likes: 1,192
From: Mojave, Ca
Don't replace your vac pump if it's working. Aftermarket vac pumps have a life-span measured in months, not decades like the OEM pump does.
IF you have plastic idler pullies, replace them with gates parts. Plastic Idler pulley tend to wear into cone-shapes, which then drives the belt to one side of the pulley and causes it to squeak.
Use a stethoscope or a 3' long piece of vinyl tube to pinpoint the squeak.
IF you have plastic idler pullies, replace them with gates parts. Plastic Idler pulley tend to wear into cone-shapes, which then drives the belt to one side of the pulley and causes it to squeak.
Use a stethoscope or a 3' long piece of vinyl tube to pinpoint the squeak.
Thread Starter
|
6th Gear
Joined: Feb 2024
Posts: 6
Likes: 0
Good to know, all of them are still OEM pulleys, I always replaced the pulley with the old one since there all in good condition. I'll make sure to get the gates parts or see if I can get the pump rebuilt. I ran into that same dilemma with the steering gear box so I went with a redhead unit and installed it.
Thread
Thread Starter
Forum
Replies
Last Post
bk117wrench
1994.5 - 1997 7.3L Power Stroke Diesel
0
May 27, 2018 06:35 PM
6CylBill
1987 - 1996 F150 & Larger F-Series Trucks
5
Jul 14, 2008 07:28 PM