That90'sRanger
New Member
- Joined
- Jul 30, 2018
- Messages
- 7
- Reaction score
- 3
- Points
- 3
- Vehicle Year
- 1990
- Make / Model
- Ford
- Transmission
- Manual
Hello everyone, sorry this is a longer post but hopefully the extra info will help.
1990 Ford Ranger XLT 4.0L M5OD-R1 4X4
So I recently replaced the rocker arms, pushrods, lower&upper intake manifold gaskets, valve cover gaskets, and some u-joints while fixing some stuff. I got everything back together then turned it on and it runs terribly. It has no power, idles terribly, and falls on its face when going WOT while in neutral. I followed a printed guide from Prodemand and also had the Ford shop manual with me. I wrote down what I took apart and where the stuff was and the order it was disassembled and used tape to try to organize things. I don't know what I could have screwed up but there is always that possibility. I actually was able to drive very slowly around the subdivision but it can't go faster than 15 MPH and makes the truck jolt forward in short, uneven intervals while driving. In neutral the engine shakes really badly. I should also mention that it was in a state of dissaembly for several weeks while I was slowly working on it.
I replaced the fuel pump with a nice delphi unit like 1.5 years ago (the old one was finally wearing out after 32 years), new fuel filter, new maf, new spark plugs, new wires, I always buy gas with techron in it, new air filter, and the parts mentioned in the paragraph above. I measured 15 inches of mercury from the brake booster hose. I measure at idle ~30 PSI of fuel pressure and going WOT for a couple seconds the PSI only slowly climbs to 35 or so. Shutting off the engine PSI seems to only drop within ~5 PSI. The vacuum line to the FPR doesn't have fuel in it after running for 10 seconds then shutting the engine off for inspection. The vacuum lines have been checked and there aren't any massive leaks anywhere even with spraying some stuff all over the engine bay I got no response from the engine. The vacuum lines match what the diagrams show on TRS. I have checked the IAC valve and it is good. The PCV valve is new. I cleaned the throttle body. I recleaned the maf just in case. I checked and all cylinders are getting spark and no one cylinder is running more rough than the others. I have been trying everything and I am running out of ideas. I really don't want to throw parts at it but with winter coming I really need this thing for the snow. I tried to test what I can before posting on here but I am at a point that I don't know what else to do. I wonder if the fuel pressure regulator is bad but I am not 100% positive.
I would really appreciate any feedback. Thank you so much. If you need any more information please let me know and I will see what I can do. I don't have a lot of specialty tools and I am also broke because of uni tuition costs.
If you are wondering why I am putting so much money and time into this thing it is because my dad bought it brand new 33 years ago and since I have some very fond childhood memories of it (Lynyrd Skynrd in the cassette drive) I would be devasted to lose it.
1990 Ford Ranger XLT 4.0L M5OD-R1 4X4
So I recently replaced the rocker arms, pushrods, lower&upper intake manifold gaskets, valve cover gaskets, and some u-joints while fixing some stuff. I got everything back together then turned it on and it runs terribly. It has no power, idles terribly, and falls on its face when going WOT while in neutral. I followed a printed guide from Prodemand and also had the Ford shop manual with me. I wrote down what I took apart and where the stuff was and the order it was disassembled and used tape to try to organize things. I don't know what I could have screwed up but there is always that possibility. I actually was able to drive very slowly around the subdivision but it can't go faster than 15 MPH and makes the truck jolt forward in short, uneven intervals while driving. In neutral the engine shakes really badly. I should also mention that it was in a state of dissaembly for several weeks while I was slowly working on it.
I replaced the fuel pump with a nice delphi unit like 1.5 years ago (the old one was finally wearing out after 32 years), new fuel filter, new maf, new spark plugs, new wires, I always buy gas with techron in it, new air filter, and the parts mentioned in the paragraph above. I measured 15 inches of mercury from the brake booster hose. I measure at idle ~30 PSI of fuel pressure and going WOT for a couple seconds the PSI only slowly climbs to 35 or so. Shutting off the engine PSI seems to only drop within ~5 PSI. The vacuum line to the FPR doesn't have fuel in it after running for 10 seconds then shutting the engine off for inspection. The vacuum lines have been checked and there aren't any massive leaks anywhere even with spraying some stuff all over the engine bay I got no response from the engine. The vacuum lines match what the diagrams show on TRS. I have checked the IAC valve and it is good. The PCV valve is new. I cleaned the throttle body. I recleaned the maf just in case. I checked and all cylinders are getting spark and no one cylinder is running more rough than the others. I have been trying everything and I am running out of ideas. I really don't want to throw parts at it but with winter coming I really need this thing for the snow. I tried to test what I can before posting on here but I am at a point that I don't know what else to do. I wonder if the fuel pressure regulator is bad but I am not 100% positive.
I would really appreciate any feedback. Thank you so much. If you need any more information please let me know and I will see what I can do. I don't have a lot of specialty tools and I am also broke because of uni tuition costs.
If you are wondering why I am putting so much money and time into this thing it is because my dad bought it brand new 33 years ago and since I have some very fond childhood memories of it (Lynyrd Skynrd in the cassette drive) I would be devasted to lose it.