Wierd Engine noise

Towtruck · 08-24-2009, 08:06 AM

I have a 1995 Ford F-150 5.8L 4x4 with 222,000 miles on it. I can rev up the engine in park or nuetral and it sounds like it should. When i take it down the highway and press down on the pedal it makes this loud rattling noise that sounds like its coming from the engine. i can't figure this one out. Any Ideas?

Towtruck · 08-24-2009, 01:26 PM

i really need someones opinion on this one the noise is really starting the **** out of me.

Case 7230 · 08-24-2009, 01:44 PM

From your description it could be bad rod bearings, however you would expect to hear them if reved from cold in Park.
If it`s more a rapid pinging sound it could be pre-ignition. A higher octane gas may cure that.
It could also be a cracked flex-plate or loose torque converter bolts or loose flex-plate to crank bolts. If some of these the starter may be noiser that before.
Just my opinion, hopefully someone else will have some ideas.

Towtruck · 08-24-2009, 01:53 PM

I'll check those out. One thing is i noticed it started doing it after i changed the timing chain. Maybe it needs to timed mor acuratly?

bradrhale · 08-24-2009, 03:30 PM

rattling sounds like exhaust problems such as a leak or possibly the inside of a cat coming apart.

stumpuller454 · 08-24-2009, 03:39 PM

I`d also say flexplate cracked.... put it in drive and attempt to do a brake stand, before you start your tires rolling see if you can hear the same noise... just an idea

BernieB · 08-24-2009, 03:55 PM

I'm going to go against popular opinion here and say your timing is off and you're getting preignition. Any chance you skipped a link putting in that chain?

leolkfrm · 08-24-2009, 04:22 PM

Quote:

Originally Posted by Towtruck

I'll check those out. One thing is i noticed it started doing it after i changed the timing chain. Maybe it needs to timed mor acuratly?

i'm with bernie!, it started after you had it apart, why did you pull it apart? had it jumped time?

Towtruck · 08-25-2009, 10:20 AM

well when i got the truck it was running a little rough so i changed it thinking it had alot of miles on so i replaced everything chain and gear set, water pump, radiator hoses, belt, did a full tune-up.it didn't skip time but someone had recently changed it and screwed up when they installed it. If i would have known that mechanic i would have reamed him out. I wasn't able to fine tune the timing because i didn't know where to unplug the ECM so that i could manually adjust it. I can brake stand and it won't do it either. i guess it might just be preignition. does anyone know where to unplug the diod for the ecm so i can manually adjust it?

FOURX4TRUX · 08-25-2009, 11:50 AM

The diode should be real close to the dist.

08-24-2009, 08:06 AM	#1
Towtruck Senior Member Join Date: Aug 2009 Location: Ft.liqourdale, FL. Posts: 95	Wierd Engine noise I have a 1995 Ford F-150 5.8L 4x4 with 222,000 miles on it. I can rev up the engine in park or nuetral and it sounds like it should. When i take it down the highway and press down on the pedal it makes this loud rattling noise that sounds like its coming from the engine. i can't figure this one out. Any Ideas? __________________ ASHES TO ASHES, DUST TO DUST, IF IT WEREN'T FOR CHEVY'S MY TOOLS WOULD RUST

08-24-2009, 01:26 PM	#2
Towtruck Senior Member Join Date: Aug 2009 Location: Ft.liqourdale, FL. Posts: 95	i really need someones opinion on this one the noise is really starting the **** out of me. __________________ ASHES TO ASHES, DUST TO DUST, IF IT WEREN'T FOR CHEVY'S MY TOOLS WOULD RUST

08-24-2009, 01:53 PM	#4
Towtruck Senior Member Join Date: Aug 2009 Location: Ft.liqourdale, FL. Posts: 95	I'll check those out. One thing is i noticed it started doing it after i changed the timing chain. Maybe it needs to timed mor acuratly? __________________ ASHES TO ASHES, DUST TO DUST, IF IT WEREN'T FOR CHEVY'S MY TOOLS WOULD RUST

08-24-2009, 03:39 PM	#6
stumpuller454 Senior Member Join Date: Dec 2007 Location: Grande Prairie, AB Posts: 2,043	I`d also say flexplate cracked.... put it in drive and attempt to do a brake stand, before you start your tires rolling see if you can hear the same noise... just an idea __________________ SUPERCHARGED 454 K2500 GMC! 450hp and 600ft/lbs http://www.youtube.com/watch?v=WJ27RJHfJKE "sailing with Captain Morgan often!"

08-24-2009, 03:55 PM	#7
BernieB Senior Member Join Date: Jul 2009 Location: Fredericksburg, VA Posts: 1,910	I'm going to go against popular opinion here and say your timing is off and you're getting preignition. Any chance you skipped a link putting in that chain? __________________ If the guys who design 'em had to take one home, use it every day for 2 years, and do all the maint and repairs themselves, cars would have a button on the dash to change the oil, filters & plugs.

08-24-2009, 01:44 PM	#3
Case 7230 Senior Member Join Date: Dec 2007 Posts: 547	From your description it could be bad rod bearings, however you would expect to hear them if reved from cold in Park. If it`s more a rapid pinging sound it could be pre-ignition. A higher octane gas may cure that. It could also be a cracked flex-plate or loose torque converter bolts or loose flex-plate to crank bolts. If some of these the starter may be noiser that before. Just my opinion, hopefully someone else will have some ideas.

08-24-2009, 03:30 PM	#5
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,030	rattling sounds like exhaust problems such as a leak or possibly the inside of a cat coming apart.

08-25-2009, 10:20 AM	#9
Towtruck Senior Member Join Date: Aug 2009 Location: Ft.liqourdale, FL. Posts: 95	well when i got the truck it was running a little rough so i changed it thinking it had alot of miles on so i replaced everything chain and gear set, water pump, radiator hoses, belt, did a full tune-up.it didn't skip time but someone had recently changed it and screwed up when they installed it. If i would have known that mechanic i would have reamed him out. I wasn't able to fine tune the timing because i didn't know where to unplug the ECM so that i could manually adjust it. I can brake stand and it won't do it either. i guess it might just be preignition. does anyone know where to unplug the diod for the ecm so i can manually adjust it? __________________ ASHES TO ASHES, DUST TO DUST, IF IT WEREN'T FOR CHEVY'S MY TOOLS WOULD RUST

08-25-2009, 11:50 AM	#10
FOURX4TRUX Full Member Join Date: Aug 2009 Location: FARMINGTON,MO Posts: 12	The diode should be real close to the dist. __________________ MYSPACE.COM/TDS

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