Well the old rig has held up well for years now, but just lately I can't figure out whats up with it.
New spark plugs 40K ago.
Starts nice and no issues idling.
No change in fuel economy
No strange noises
But...
An Issue has come on pretty suddenly.
If I don't let it warm up for 5 mins its pretty hard to drive it. Even smooth slight acceleration has it retarding and jumping around as it tries to pull forward. Almost like it was missing as you try to accelerate away. This has sometimes been the case previously (And i couldn't figure that out either) but after it gets warmer a minute down the road things got back to normal.
But now, this is persisting. Its pretty bad when cold, jerking and jumping trying to accelerate. When warm, its now a bit jumpy all the time when trying to accelerate.
Give it a boot full when warm, and it will be jerky / notchy acceleration until finally in the upper revs band it smooths out and pulls pretty well.
Normally I would say spark plugs, but they are pretty new (not that i should rule those out given the circumstances).
Also wondering if there is some temperature sensor issue. No indication of anything. But i seem to remember threads here which may have indicated this type of thing can be temp sensor related.. Can't see any faults on the Scan gauge.
Have checked the mass airflow wire on the intake. Always keep that clean.
Final thoughts are coil packs..?
Oxygen sensors - from memory theres several of these but would have thought bad economy to be the result of this failure?
BTW its duel fuel still. Petrol and Gas Injection (yep, still seems to be going fine after all these years.... until now). Doesn't seem to matter if on fuel or gas. Problem persists so likely whatever it is, its a common element not related to the fuel system and more central.
Thankful for any suggestions / Thoughts. 220K on the clock (It only gets out on weekends now days)
New spark plugs 40K ago.
Starts nice and no issues idling.
No change in fuel economy
No strange noises
But...
An Issue has come on pretty suddenly.
If I don't let it warm up for 5 mins its pretty hard to drive it. Even smooth slight acceleration has it retarding and jumping around as it tries to pull forward. Almost like it was missing as you try to accelerate away. This has sometimes been the case previously (And i couldn't figure that out either) but after it gets warmer a minute down the road things got back to normal.
But now, this is persisting. Its pretty bad when cold, jerking and jumping trying to accelerate. When warm, its now a bit jumpy all the time when trying to accelerate.
Give it a boot full when warm, and it will be jerky / notchy acceleration until finally in the upper revs band it smooths out and pulls pretty well.
Normally I would say spark plugs, but they are pretty new (not that i should rule those out given the circumstances).
Also wondering if there is some temperature sensor issue. No indication of anything. But i seem to remember threads here which may have indicated this type of thing can be temp sensor related.. Can't see any faults on the Scan gauge.
Have checked the mass airflow wire on the intake. Always keep that clean.
Final thoughts are coil packs..?
Oxygen sensors - from memory theres several of these but would have thought bad economy to be the result of this failure?
BTW its duel fuel still. Petrol and Gas Injection (yep, still seems to be going fine after all these years.... until now). Doesn't seem to matter if on fuel or gas. Problem persists so likely whatever it is, its a common element not related to the fuel system and more central.
Thankful for any suggestions / Thoughts. 220K on the clock (It only gets out on weekends now days)
Comment