99 4.0L problems
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Joined: Jan 2004
Posts: 13,851
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From: SW Va
Well the onset with cooler weather could be a clue to something like the intake manafold fasteners loosening up & causing a gasket leak.
Why not do a vacuum leak check with a propane sniffer as suggested by NewEnglandHeardsman. I "ve fashioned one from a metal sports ball inflation needle & some rubber hose.
If you find it's leaking, check the fastenrs & see if any are loose, maybe if your lucky retorquing them will suffice!!!!
Why not do a vacuum leak check with a propane sniffer as suggested by NewEnglandHeardsman. I "ve fashioned one from a metal sports ball inflation needle & some rubber hose.
If you find it's leaking, check the fastenrs & see if any are loose, maybe if your lucky retorquing them will suffice!!!!
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
The TSB that covers the 4.0L OHV is applicable only to the the '97 Ranger and Aerostar. There may be other TSBs out there that cover other engines with similar concerns, such as those used in the Excursion and Escort, but those other TSBs are not relevant to the Ranger nor the 4.0L. Keep in mind too that the date of a TSB is not meant to correlate with the model years that are covered therein.
Here is the TSB (98-6-8) that covers the Ranger 4.0L OHV
Here is the TSB (98-6-8) that covers the Ranger 4.0L OHV
Lead Driver
Joined: Jul 2004
Posts: 5,946
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From: in the woods of MA
Rockledge - I'm not too familiar with the TSB mechanism - is the TSB referenced in the link I included a different one that doesn't apply to the 4.0L?
The link again:
https://www.ford-trucks.com/tsb/tsb....y-1999/t-01205
The link again:
https://www.ford-trucks.com/tsb/tsb....y-1999/t-01205
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
Originally Posted by NewEnglandHerdsman
Rockledge - I'm not too familiar with the TSB mechanism - is the TSB referenced in the link I included a different one that doesn't apply to the 4.0L?
The link again:
https://www.ford-trucks.com/tsb/tsb....y-1999/t-01205
The link again:
https://www.ford-trucks.com/tsb/tsb....y-1999/t-01205
ISSUE:
Some vehicles may exhibit vacuum or air leaks in the Intake Manifold and/or Engine System causing DTC's, P0171 (System Too Lean (BANK 1), and/or P0174 (System Too Lean (BANK 11). This article can also be used if you suspect a vacuum leak that has not generated a DTC.
ACTION:
Use the Rotunda's Vacutec 522 - Smoke Leak Detector Machine to help detect vacuum or air leaks in the engine compartment air intake or vacuum system. Refer to the following Service Procedure for details...
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Joined: Jan 2006
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just a future reference for others, i picked up the gaskets i needed to fix my problem
UPPER INTAKE GASKETS (3) required pt# F57Z-9E436-AA PRICE WAS 2.66$ EACH
FUEL RAIL TO LOWER INTAKE PT# F6TZ-9E436-C PRICE WAS 24.42$
LOWER INTAKE GASKET PT# F7TZ-9439-AA PRICE WAS 31.69$
thanks for everyones help, im gonna get started on this project this weekend
UPPER INTAKE GASKETS (3) required pt# F57Z-9E436-AA PRICE WAS 2.66$ EACH
FUEL RAIL TO LOWER INTAKE PT# F6TZ-9E436-C PRICE WAS 24.42$
LOWER INTAKE GASKET PT# F7TZ-9439-AA PRICE WAS 31.69$
thanks for everyones help, im gonna get started on this project this weekend
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Bunggo
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Mar 25, 2010 10:55 PM
