Why will it not accelerate correctly?

Asked by eldorodo Apr 19, 2013 at 07:40 PM about the 1988 Ford E-Series E-150 Econoline Ext

Question type: General

1988 E-150 with 302 Multi-port, new plugs, new fuel filter, new air filter, no cat. converter, fuel press. in rail is 37 p.s.i., MAP good, has a auto. trans w/overdrive... in overdrive it will hardley maintain 55 MPH... if you come to any incline at all... hard to get over 35-MPH.. put it in drive, maybe a little better, but not much... LACKS ACCELLERATION AND POWER...

migration_judge_roy answered 11 years ago

...again, am like a broken record here, it's the EGR valve, what takes exhaust gas and puts it into the intake manifold under decel and/or specific conditions, gets messed up with carbon and frequently has a leaking vacuum control hose~ take it apart and de-carbon it, or buy a new one~

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5,900

mrmoony answered 11 years ago

Could be something dealing with the ignition timing. Where it will run good but no power. Vacuum advance if it has one.

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