TheLoganZilla
Member
- Joined
- Oct 5, 2020
- Location
- Morris County, NJ
My first post on this site; greatly appreciated the information I've managed to find here, but I just can't seem to get a solid read on this particular problem I'm having. Currently, I am on a road trip in my 1993 Volvo 940 Turbo. A day or two ago I was accelerating on the highway when all of a sudden I got a large backfire and the engine started lurching. I let down on the throttle and it went back to normal. Ever since then, the engine has absolutely refused to break 3000-3100 rpm. If I give it half throttle and build boost, it's happy up 'til 3000, then I get pops and lurches; if I roll into in gently at highway speed, the engine just stops climbing at 3000. There are no other changes to how it runs; starts the same, idles the same (a little lumpy but never stalls), and drives the same below 3000 rpm. If I have the car in park it'll rev happily up to redline, but not when it's under load. I checked the codes and its throwing a 3-1-1 code indicating the speedometer, but the speedo works fine when I'm driving. Could that code be a cause or an effect of the problems I'm having? I also checked the airbox and intake piping up to the turbo for obstructions but found none. Any thoughts are greatly appreciated as I would rather not blow up my motor in the middle of a trip.
Mods include:
3" decat turbo-back exhaust
td04hl-19t turbo (13c crapped itself after 200000 miles)
IPD lowering springs
Bilstein shocks all 4 corners
Poly front bushings
Oil Catch can installed to assist with oil in the intake
Mods include:
3" decat turbo-back exhaust
td04hl-19t turbo (13c crapped itself after 200000 miles)
IPD lowering springs
Bilstein shocks all 4 corners
Poly front bushings
Oil Catch can installed to assist with oil in the intake