A misfire under load complaint can usually be broken down into 2 categories. ...
The transmission downshifts and the engine revs up to about three thousand ...
It is often said that for an engine to run you need fuel, air, and spark. ... on the
carburetors for a smooth idle and to prevent hesitation on acceleration. ... Near
zero valve clearance will also cause misfire, as a valve may not be closing ...
higher speed, or climbing a long hill with higher throttle setting (hotter running
My vehicle lacks power on hills but is fine on flat roads; Engine shakes while ....
During acceleration this misfire gets so extreme it can cause the engine to stall.
The things that usually cause spark knock (detonation) are: ... a pinging or rattling
sound (spark knock) when accelerating, driving up a hill, or when the engine is ...
Apr 5, 2011 ... It seems the car is misfiring the engine is under load, like when you are trying to
... Here are a few things that could cause this kind of drivability ..... losing
acceleration only goes up to 20 ,most when climbing towards the hill ...
When engine hot on the highway, when second venturi of ... ... This happens ofter
when pulling up a rolling hill or accelerating briskly from stop. ... It's also known
that old spark plugs & plug wires can cause the problem you ..... OP says :454
P30 Chev Misfires When Hot Under Load I don't think what OP is ...
Nov 7, 2011 ... It has 179K miles and supposedly about 5k on a new engine, what ever that may
be. ... does the trick to keep the engine running smoothly while climbing the hill. ...
If you don't have codes then I'd be surprised if the issue is actually a misfire. ...
Missing under load is a symptom of bad plugs and bad coils.
Aug 12, 2012 ... Today I go out and have the AC going, the check service engine light comes ... I
finally figured out what was causing my car to jerk upon fast acceleration. .... the
car cant move good again, cant climb hill with it force and speed, ...
No engine lights come on, no overheating, nothing!!! .... that the engine was not
getting the gas it needed as it would cough and stutter when I tried to climb hills
or increase power, the pump and filter seemed to be the cause.
Jan 13, 2016 ... A faulty VVT switch will also cause the engine to misfire or appear to stumble
when your vehicle is loaded with extra weight, climbing hills, or when you apply
quick pressure to the throttle for instant acceleration.