Join Date: Aug 2009
Location: Richmond, BC
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The PO, has spent quite a bit on truck, new front end & tranny, but was vague on engine repairs (sure he spent a lot before putting it for sale).
Although it sounded and felt like it was running on 5 cylinders, it drove no better! On the good side the blow-by was almost non-existent, coolant was clean, good to -40, but the Ph was at 11.0
So i took the plunge and made an offer and it was accepted...
Figuring the problem was electrical / injection related.
Had couple problems...
1. Could not get Autoenguity to connect to ECU...
Went to Brown Brothers Ford to get more info...
They checked the VIN, it was bought new in Saskatchewan, had a couple of minor warranty claims. The last entry was from April 1995. Brown Bros. said that their have been several updates to to ECM, one of them initialized the OBD2 port.
Bought 2 new valve cover gaskets and 2 new under valve cover wiring harness's, from Brown Bros (they had them in stock). $$$
2.passenger side valve cover gasket looked like it had been damaged or someone made a Mickey mouse electrical repair repair to it.
Bought 2 new valve cover gaskets and 2 new under valve cover wiring harness's. Engine ran much better!
Changed oil & filter, vacuumed out high pressure oil pump reservoir and poured in 2 quarts of Risoline into high pressure reservoir.
After 10 minutes engine settled down and ran perfect!!!!!!!!!!!!!!!!!!
Was it just an electrical problem?
Or was there a sticky injector?
Did the Risoline help?
Will never know...
3. Paid dealer $170.00 to use their "Thumb" to re-flash the ECU to latest update.
Autoenguity now works!
Engine still kept throwing random engine & tranny codes and setting 'check engine' lamp on, intermittently for months... but engine ran perfectly!
At Christmas the alternator quit charging. Put in a rebuilt exchange unit.
NO MORE CODES!
Have checked all the wiring and grounds, all looks good. Maybe some weird fault with alternator generating harmonics due to failed or failing diodes?
Maybe the alternator led previous mechanics astray in diagnosing problems.