95 Probe lost excelleration at 3k RPM then... - Ford Forums

vindicat0r · 07-22-2009, 23:11

I was driving on the HW in 5th gear and I was approaching 75mph and 3k rpm. Then all of a sudden the engine power declined and I decelerated to 55mph.

From then on no matter what gear when the car approaches 2.2k rpm the car raddles in a forward and back motion. However, I can drive through the raddling and the car stops at 2.5k to 3.k in 5th gear. Also, in 2nd, 3rd and 4th gear the engine will rev at 2.5k rpm as if you put the pettal to the metal in first. like the rpm meter jumps up in down.

The car seems to have lost its power, i'm thinking cracked head, a clog in the fuel injector or something along those lines, but Maybe a more experienced car person could narrow or help me narrow the problem.

btw the waters good, the fuel is good. there is no overheating and oil pressure is normal. the car has fresh tires and a new alinement.

DRU842 · 07-24-2009, 14:53

How old & in what condition are the plug leads?

vindicat0r · 07-24-2009, 22:24

It's a 95 and by leads do you mean spark plug leads, because they look really good.

vindicat0r · 07-25-2009, 10:22

I did some testing today.

I cleaned the plug leads by the spark plugs and they had some dirt and grease on them.

I started the car and kept it in neutral. I revved the engine and it was sluggish like before. I let off the gas and did it again. low and behold it the engine was revving normally. I took it for a spin and it was like new, but a quarter mile down the road the car lost most of it power again.

I pulled over and checked all the spark plugs again, but, this time, when I pulled the 4th spark plug (the one closest to the driver side) this blue rubber piece came up that was wierd. I say weird because the way it attached to the end of the spark plug lead was not condusive to electrcity. this piece would have kept the sparks from the plug from hitting the metal end of the lead. Also, this peice was not the other plugs. I just took it off.

I started back down the road and the car was back to normal again. it even was doing better than before. By that I mean that, in each gear, the speed of the car was greater at the respective RPM. however, to my dispmay the car lost power again. When i got it home i turned it off to check to see if the spark plug was the ultimate culprit by not messing with the spark plugs. So I just restarted the car and revved it in neutral, as i had done before, and it was normal. Normal meaning I put on the gas and the RPM meter went up steadely and I held it at 3.5k RPM for about 15sec and then released the gas slowly and the meter came down slowly as well.

Maybe it has something to do with the spark plugs, or leads, or I saw a crack in the hose leading from the air intake (after the air filter) to the air manafold (not sure if it's call the manafold. its the air piece that connects to the engine). However, just knowing physics I would say its a compression issue.

DRU842 · 07-31-2009, 15:15

Glad to see the problem appears fixed. The leads can deteriorate with no external signs. A good set hould last 100,000km or so.