Tune-up a 89 F-150.

Doug1962 · 09-18-2009, 04:50 PM

I am planning to tune-up my 89 F-150, because something is causing a misfire on my 5.8 engine. I've had the truck for nearly ten years and this will be the first time it will have a tune-up. I'm going to try to do the work myself, instead of going to a shop and paying $200 to $300.

I have been searching the name brands for spark plugs, plug wires and distubutor caps and buttons.

But I don't know which is best when there is several to choose from like Motorcraft, Autolite, Xcel, NGK and Bosch. Some cost more than others. Any suggestions?

black cloud · 09-19-2009, 12:11 AM

I have an 89 full size bronco with same engine (5.8l). Motorcraft is always good but any will do. The NGK and Bosch are mostly for foren cars and trucks. The spark plugs I use Motorcraft or Autolite. I dont recomend thoes crossfire of split fire type of plugs because it just takes a nice spark and breaks it down to two or four weaker sparks (that is my opinion though).

BroncoJoe19 · 09-19-2009, 01:25 PM

Do one wire at a time, and route it the same way that it came off. If they are not properly routed, and are run too parallel they can develop an induction missfire.

I'd stick with morotrcraft whenever possible.

Doug1962 · 09-20-2009, 03:34 PM

Thanks for the information. I know about the plug wires and installing them one at a time. I used to tune-up old Chryslers, but never a Ford.

I have decided to buy Motorcraft spark plugs.

BroncoJoe19 · 09-20-2009, 03:41 PM

Fords, Chevys, Chryslers... same stuff... different names.

Doug1962 · 09-23-2009, 02:32 AM

Well the other day I decided to crank my truck and the engine was running fine. I have no idea what cause to misfire lastweek. Somebody told me it probably had moisture built up.

We did had a lot of rain and high humidity for the past two-weeks. But I'm still thinking about tuning it up anyway.