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I have an 1988 Volvo 240DL automatic, with @250,000 mile...engine pulls very strong from a stand still,
However I have noticed the engine buck real bad if I floor the car out doing any speeds above 85 to 90 mph...
I have ran STP and Techron fuel injector cleaners through the tank,
The car has a new fuel filter, ? fuel rail pressure regulator?, new main pump, new plug wires, new cap and rotor, new plugs
and I always run 93 octane gas
What am I missing ?
Would I failed prepump cause this ?
What else would cause this problem ?
Thank You!
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