DNGR_RNGR
New Member
- Joined
- Oct 22, 2007
- Messages
- 9
- Reaction score
- 1
- Points
- 0
- Location
- Belleville, PA
- Vehicle Year
- 1994
- Make / Model
- Ford
- Transmission
- Manual
Hi guys,
New member here, long time member over at FTE. I have searched for hours here on this forum and need some advice.
1994 Ranger 4.0L/5spd 4x4
I took my truck to my mechanic last week to have the clutch changed in it. Since we couldn't get it in the shop right away, I wanted to diagnose a problem I had been having.
The truck would fire right up every time and ran very good 85% of the time; the other 15% of the time it ran crappy. Did this intermitently. The CEL doesn't work, so I wanted to have it scanned.
I have cleaned the MAF, installed a new IAC and TPS.
The day we tried to scan the computer, something got screwed up and the truck wouldn't start right. It seemed like the PCM was getting a command that the truck was at WOT. The engine would instantly flood upon trying to start. The only way we could get it to start was to unplug the fuel pump relay and then plug it back in once it started. Once running it would idle at ~2500-3000 rpm.
While my mechanic was working on another vehicle I pulled the intakes and VC's off and changed the gaskets. Buttoned everything up and got the clutch changed.
Now the truck will start with the fuel pump relay plugged in but only if it is cold and you have to crank for quite some time. Once the engine is warm and you shut it down, it doesn't want to start again without cranking it for a VERY long time. Always getting spark. It idles better and reving the throttle indicates the engine is quite responsive.
We checked the fuel pressure at the rail and it is fine. Holds pressure after the truck is shut down. So we believe the FPR to be fine, no gas in the vacuum line.
The computer is spitting out a pile of codes. 113; 118; 121; 341; 522; 539; 542; 558. The 118 code for the ECT can't be right because I changed it for good measure while I had the lower intake off.
Then we took a test light and hooked it to the positive side battery terminal and put the probe into the ground wires (back probing) for the TPS, ACT, and the DPFE sensors. Doing this would barely light the test light. So we were starting to consider a weak ground in or going to the PCM. We have also considered the PCM to be bad. We have swapped relays around to no avail.
I know this was a long post and I probably forgot some details, but this truck really has us baffled. Some of the codes don't make any sense. There was a code for the AC/defrost being on during the test-it wasn't. Another code for the vehicle not being in park/neutral-it was.
ANy ideas? Thanks for any help you guys can lend. Great site!!
New member here, long time member over at FTE. I have searched for hours here on this forum and need some advice.
1994 Ranger 4.0L/5spd 4x4
I took my truck to my mechanic last week to have the clutch changed in it. Since we couldn't get it in the shop right away, I wanted to diagnose a problem I had been having.
The truck would fire right up every time and ran very good 85% of the time; the other 15% of the time it ran crappy. Did this intermitently. The CEL doesn't work, so I wanted to have it scanned.
I have cleaned the MAF, installed a new IAC and TPS.
The day we tried to scan the computer, something got screwed up and the truck wouldn't start right. It seemed like the PCM was getting a command that the truck was at WOT. The engine would instantly flood upon trying to start. The only way we could get it to start was to unplug the fuel pump relay and then plug it back in once it started. Once running it would idle at ~2500-3000 rpm.
While my mechanic was working on another vehicle I pulled the intakes and VC's off and changed the gaskets. Buttoned everything up and got the clutch changed.
Now the truck will start with the fuel pump relay plugged in but only if it is cold and you have to crank for quite some time. Once the engine is warm and you shut it down, it doesn't want to start again without cranking it for a VERY long time. Always getting spark. It idles better and reving the throttle indicates the engine is quite responsive.
We checked the fuel pressure at the rail and it is fine. Holds pressure after the truck is shut down. So we believe the FPR to be fine, no gas in the vacuum line.
The computer is spitting out a pile of codes. 113; 118; 121; 341; 522; 539; 542; 558. The 118 code for the ECT can't be right because I changed it for good measure while I had the lower intake off.
Then we took a test light and hooked it to the positive side battery terminal and put the probe into the ground wires (back probing) for the TPS, ACT, and the DPFE sensors. Doing this would barely light the test light. So we were starting to consider a weak ground in or going to the PCM. We have also considered the PCM to be bad. We have swapped relays around to no avail.
I know this was a long post and I probably forgot some details, but this truck really has us baffled. Some of the codes don't make any sense. There was a code for the AC/defrost being on during the test-it wasn't. Another code for the vehicle not being in park/neutral-it was.
ANy ideas? Thanks for any help you guys can lend. Great site!!
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