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PanamaExpat
Active Member
- Joined
- May 28, 2011
- Messages
- 1,076
- Reaction score
- 13
- Points
- 38
- Location
- Panama City, Rep. of Panama
- Vehicle Year
- 1994
- Make / Model
- Mazda
- Engine Size
- 4 liter
- Transmission
- Manual
Hello to everyone:
This is my first post so I will use it as my introductory post and my first question about my truck. I have a 1994 Mazda/Ranger B4000 with the 4 liter in it. I bought it a little over a month ago and have done several things to it already. I know my transmission is shot but am expecting a new one to arrive from USA this coming week.
The problem I am having seems to run in spells. Start the truck in the morning and it revs up to 12 or 1300 then dies. After 2 or 3 restarts we're off to the races and can generally get to the job site without further incident. Shut off the truck and let it sit for a few minutes then need to go pick up materials and it is the same thing. Starts up, revs a bit high then dies. after it goes through this it drops back to about 650 rpm with AC on and for the most part runs fine. Every now and then it will stall at a traffic light and will go through the same procedure. Before it dies it acts like the computer is hunting the proper idle as it will drop into the 400s then pull back up to about 1200 and just seems to get lost then dies. After a couple of restarts and little driving it goes back to normal.
To date because of info I have read on this forum. I have done the following:
Cleaned MAF
Checked TPS
Replaced IAC
Searched for vacuum leaks (none found)
Switched around the fuel pump relays
Replaced air filter (same time as MAF clean)
Noticed some wild voltage fluctuations when turning on AC and other accessories. Cleaned chassis grounds. (had this problem on Mustang, Lincoln, and old F250 a few years back) Voltages now back to normal.
Have not:
Checked ECU codes (don't have USB adapter)
Changed fuel filters (doesn't give indication of fuel starvation at speed)
Changed intake manifold. Since problem is intermittent not sure if this could be the case.
I have notice that there is a different ECU (has JY marker on it indicating is from an Explorer) in the vehicle so I am presuming the previous owner was having the same issue.
This truck was shipped in by a local dealer from the USA. So I do not know anything about it's past life or owners. But, I sure could use a couple pointers on what to look for next.
Sorry for the long post but this problem is really becoming a bother.
This is my first post so I will use it as my introductory post and my first question about my truck. I have a 1994 Mazda/Ranger B4000 with the 4 liter in it. I bought it a little over a month ago and have done several things to it already. I know my transmission is shot but am expecting a new one to arrive from USA this coming week.
The problem I am having seems to run in spells. Start the truck in the morning and it revs up to 12 or 1300 then dies. After 2 or 3 restarts we're off to the races and can generally get to the job site without further incident. Shut off the truck and let it sit for a few minutes then need to go pick up materials and it is the same thing. Starts up, revs a bit high then dies. after it goes through this it drops back to about 650 rpm with AC on and for the most part runs fine. Every now and then it will stall at a traffic light and will go through the same procedure. Before it dies it acts like the computer is hunting the proper idle as it will drop into the 400s then pull back up to about 1200 and just seems to get lost then dies. After a couple of restarts and little driving it goes back to normal.
To date because of info I have read on this forum. I have done the following:
Cleaned MAF
Checked TPS
Replaced IAC
Searched for vacuum leaks (none found)
Switched around the fuel pump relays
Replaced air filter (same time as MAF clean)
Noticed some wild voltage fluctuations when turning on AC and other accessories. Cleaned chassis grounds. (had this problem on Mustang, Lincoln, and old F250 a few years back) Voltages now back to normal.
Have not:
Checked ECU codes (don't have USB adapter)
Changed fuel filters (doesn't give indication of fuel starvation at speed)
Changed intake manifold. Since problem is intermittent not sure if this could be the case.
I have notice that there is a different ECU (has JY marker on it indicating is from an Explorer) in the vehicle so I am presuming the previous owner was having the same issue.
This truck was shipped in by a local dealer from the USA. So I do not know anything about it's past life or owners. But, I sure could use a couple pointers on what to look for next.
Sorry for the long post but this problem is really becoming a bother.
