Mbeas96
Member
- Joined
- Aug 7, 2017
- Location
- Charleston
1990 740 lh2.4, aw71, chipped ezk and wasted spark using miata powerstage and bosch coil pack (out of a land rover discovery), recently non chipped 9xx fuel ecu which fixed my random rich stumble/misfire, 16t at 12psi, npr intercooler, t5 injectors and resistor pack bypass, do88 turbo inlet hose
On my 25 mile trip home from work, all was fine, passed a couple people on the 2 lane highway and not a hiccup. All the way until about 2 miles away form my house, i floor it from a stop and it is taking off alot slower than usual building boost and as soon as it hits 10psi it starts bucking and misfired right before i let off. Very suprised i let it cool for about a mile and a half and tried to slowly build boost in a higher gear. It is very inconsistent power and bucks alot. AFR's on the guage show it goes from 12s to 14s and back again.
Thinking i was experiencing some sort of spark blowout, I made it home, let it cool, and reseated the plug wires on the plugs and onto the coil pack. Also made sure there were no tears in the wires. This time, pulling out the driveway switching from reverse to nuetral the afrs went full lean (17+) and the rpm guage was barely above 0, car was shaking and about to turn off, i tapped the gas and the problem stopped. idle normal and made it to the end of my road. Went to turn onto the highway and same thing. Shaky car, lean reading and dying rpms.
Let off the gas and got bakc on it and it pulled out into traffic fine. But as soon as i tried to get into boost, afr's start going crazy, bucking and farting start. Went half a mile to a gas station, turned it off, started fine, idled fine, pulled thru the parking lot fine, but again more than like a quarter throttle and things start to go wrong.
No CEL, no codes on sockets 2 or 6. rsr and harness and fuel pump relay replaced around 6 months ago, plugs and wires around a year old. Not to sure where i should start checking things out. Usually when things go wrong with this car it pops a cel code or something to get me started...
On my 25 mile trip home from work, all was fine, passed a couple people on the 2 lane highway and not a hiccup. All the way until about 2 miles away form my house, i floor it from a stop and it is taking off alot slower than usual building boost and as soon as it hits 10psi it starts bucking and misfired right before i let off. Very suprised i let it cool for about a mile and a half and tried to slowly build boost in a higher gear. It is very inconsistent power and bucks alot. AFR's on the guage show it goes from 12s to 14s and back again.
Thinking i was experiencing some sort of spark blowout, I made it home, let it cool, and reseated the plug wires on the plugs and onto the coil pack. Also made sure there were no tears in the wires. This time, pulling out the driveway switching from reverse to nuetral the afrs went full lean (17+) and the rpm guage was barely above 0, car was shaking and about to turn off, i tapped the gas and the problem stopped. idle normal and made it to the end of my road. Went to turn onto the highway and same thing. Shaky car, lean reading and dying rpms.
Let off the gas and got bakc on it and it pulled out into traffic fine. But as soon as i tried to get into boost, afr's start going crazy, bucking and farting start. Went half a mile to a gas station, turned it off, started fine, idled fine, pulled thru the parking lot fine, but again more than like a quarter throttle and things start to go wrong.
No CEL, no codes on sockets 2 or 6. rsr and harness and fuel pump relay replaced around 6 months ago, plugs and wires around a year old. Not to sure where i should start checking things out. Usually when things go wrong with this car it pops a cel code or something to get me started...