My car bogs down frequently when starting out.I changed fuel filter,air filter, had an exhaust leak fixed.Had compression check done, excellent compression on all four cylinders.It's not a miss, like electrical.Any ideas?
2007-04-05 06:40:45 · 4 answers · asked by George Washington 4 in Cars & Transportation ➔ Car Makes ➔ Volvo
Hi, check the coil pack, plugs and wires.
2007-04-05 13:00:17 · answer #1 · answered by ? 7 · 0⤊ 0⤋
If your car idles erratic (goes up and down), it is probably the fuel pressure regulator. I changed the fuel filter, spark plugs, plug wires, dist cap and rotor, fuel pumps and rewired the engine wiring harness and still had the problem. I then changed the fuel pressure regulator and it ran great again. The part is about $50-60 from Volvo.
If your car idles a little rough, I would check for a vaccuum leak. Check the vaccuum hoses and spray some carb cleaner around the intake manifold. You may also have a bad intake manifold gasket. Also, check the intake plenium (rubber part) for cracking. I had to change this part also.
Good luck!
Greg
2007-04-07 01:27:11 · answer #2 · answered by Greg K 3 · 0⤊ 0⤋
by unplugging air mass unit you force computer into limp home mode [starting and off idle performance will be affected] but if general improvement is noted in drivability then air mass sensor replacement is needed [ to prevent future troubles replace the thermostat inside the air cleaner housing] thic controls the damper door for heated air from the exhaust manifold heat door should be fully closed by 100-120 degrees F
2007-04-08 08:27:42 · answer #3 · answered by hobbabob 6 · 0⤊ 0⤋
is your car a turbo or not? i would check the mass airflow sensor for faults, and possibly a bad oxygen sensor. if it is a turbo look for weak rubber airflow hoses that collapse under acceleration.
2007-04-06 09:09:45 · answer #4 · answered by msgv1919 2 · 1⤊ 0⤋