MarkusMcBride
Member
- Joined
- Aug 18, 2015
- Messages
- 56
- Reaction score
- 9
- Points
- 8
- Location
- Western Canada
- Vehicle Year
- 1987
- Make / Model
- Ford
- Engine Type
- 2.9 V6
- Engine Size
- 2.9
- Transmission
- Manual
- 2WD / 4WD
- 4WD
Hi, My 87 2.9L manual ranger is running rough and I am running out of ideas as to what it could be. Here's what it runs like:
Idles a bit rough tho not bad enough to stall. All cylinders are firing just not at 100%. When reved up, it smooths out, quits shaking.
What I've done: I had the upper intake off and replaced the valve cover gaskets, i actually took 12 of the 16 valve cover bolts out by hand. I replaced the dist. cap and rotor, all wires, new coil, I did not change the 2 year old plugs as they still look in great condition. I threw it all back together and did notice improvement tho its not where i want it to be. I did a compression test and all cylinders were roughly 125-135. so no rings and no valves/heads.
When i took the fuel rail apart, I noticed that one injector wasn't stock and looked different. I believe it was above the pass. side rear cylinder which had the only plug that wasn't burning fully. the previous owners mechanic changed a few things to do with the fuel system, the lines look aftermarket, the filter looks newer and the fuel pressure reg. is brand new.
What do you guys think, where should I go next here and/or what are some tests i can do to try to isolate the problem? Help is appreciated! There are other issues with the truck but I am focussing on the running condition before anything else.
Idles a bit rough tho not bad enough to stall. All cylinders are firing just not at 100%. When reved up, it smooths out, quits shaking.
What I've done: I had the upper intake off and replaced the valve cover gaskets, i actually took 12 of the 16 valve cover bolts out by hand. I replaced the dist. cap and rotor, all wires, new coil, I did not change the 2 year old plugs as they still look in great condition. I threw it all back together and did notice improvement tho its not where i want it to be. I did a compression test and all cylinders were roughly 125-135. so no rings and no valves/heads.
When i took the fuel rail apart, I noticed that one injector wasn't stock and looked different. I believe it was above the pass. side rear cylinder which had the only plug that wasn't burning fully. the previous owners mechanic changed a few things to do with the fuel system, the lines look aftermarket, the filter looks newer and the fuel pressure reg. is brand new.
What do you guys think, where should I go next here and/or what are some tests i can do to try to isolate the problem? Help is appreciated! There are other issues with the truck but I am focussing on the running condition before anything else.