1991 740 Turbo cranks but will not start
-
BaffledByBrick
- Posts: 2
- Joined: 15 July 2012
- Year and Model: 740 Turbo, 1991
- Location: San Luis Obispo, CA
1991 740 Turbo cranks but will not start
...was 40 miles (and a full tank of gas) into a 350 mile trip, on a hot day, when suddenly lost power. Attempts to restart unsuccessful, had to be towed. Assumed, based on age of vehicle, and common complaint of either fuel pump(s), fuse, or relay as the cause. Replaced BOTH fuel pumps, fuse checks out okay, newer battery easily cranks, relays seem okay...is there a reset button / process I am not aware of? DIY suggestions that don't involve a code reader?
-
BaffledByBrick
- Posts: 2
- Joined: 15 July 2012
- Year and Model: 740 Turbo, 1991
- Location: San Luis Obispo, CA
SUCCESS!
...I wrote this long very detailed narrative about how I solved my problem, accidentally hit the wrong key, it disappeared, and unfortunately I could not recover it...I do not currently have the desire or energy to rewrite it...so, it must suffice that the most critical replacements appear to have been the Coil Wire, the Crank Position Sensor, and the Turbo-Charger Intercooler hose (with sensor)...it has never run better...
...before discovering the magic combination above, I replaced the MAF (for the third time), the Fuel Pressure Regulator, all vacuum lines / hoses, both fuel pumps (in-line and in-tank), the ECU / ECM, the Fuel Pump / Radio Suppression Relays, the Spark Plug Wires, the alternator and the battery plus I removed the air box foam filter and thoroughly cleaned the throttle body; each of those repairs resulted in only modest improvement...
...what I learned, and I hope others can take from this experience is - 1) that though the Brick is a wiley and sometimes troublesome character, one must never give up - 2) it is important that one does not rely on (direct) visual inspection, codes, gauges, meters, etc. AND - 3) one MUST follow (especially the back / under / blind sides of the) hoses, wiring, etc. with one's fingers / hands feeling for gashes, gouges, holes, and other imperfections which the Volvo is notorious for developing in that hot as hell environment known as the engine compartment (none of the 3 critical failures depicted in the pictures was easily visualized or readibly apparent prior to my careful fondling of my Brick)...
...I expect I will again battle the Brick...I frequently felt frustrated and beaten, but ultimately I was not defeated...and, if you continue to fight this good fight, neither will you...
...I wrote this long very detailed narrative about how I solved my problem, accidentally hit the wrong key, it disappeared, and unfortunately I could not recover it...I do not currently have the desire or energy to rewrite it...so, it must suffice that the most critical replacements appear to have been the Coil Wire, the Crank Position Sensor, and the Turbo-Charger Intercooler hose (with sensor)...it has never run better...
...before discovering the magic combination above, I replaced the MAF (for the third time), the Fuel Pressure Regulator, all vacuum lines / hoses, both fuel pumps (in-line and in-tank), the ECU / ECM, the Fuel Pump / Radio Suppression Relays, the Spark Plug Wires, the alternator and the battery plus I removed the air box foam filter and thoroughly cleaned the throttle body; each of those repairs resulted in only modest improvement...
...what I learned, and I hope others can take from this experience is - 1) that though the Brick is a wiley and sometimes troublesome character, one must never give up - 2) it is important that one does not rely on (direct) visual inspection, codes, gauges, meters, etc. AND - 3) one MUST follow (especially the back / under / blind sides of the) hoses, wiring, etc. with one's fingers / hands feeling for gashes, gouges, holes, and other imperfections which the Volvo is notorious for developing in that hot as hell environment known as the engine compartment (none of the 3 critical failures depicted in the pictures was easily visualized or readibly apparent prior to my careful fondling of my Brick)...
...I expect I will again battle the Brick...I frequently felt frustrated and beaten, but ultimately I was not defeated...and, if you continue to fight this good fight, neither will you...
- Attachments
-
- Turbo-Charger Intercooler Hose gash
-
- Crank Position Sensor wiring damage (both ends)
-
- Coil Wire (burned through)
-
- Similar Topics
- Replies
- Views
- Last post