Car lags when gas at full throttle
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Car lags when gas at full throttle
when i drive my 1998 jaguar xjr and hit the gas at full throttle, it almost feels like it lags and pulsates constantly. the engine runs great so it must be the transmission. any other thoughts or has anyone else had this problem? i would appreciate all the help i can get
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if i hit the accelarator hard from a dead stop, the car does just fine, no lagging or anything. but if im driving about thirty miles an hour and punch it, it staggers. The car has been sitting in storage for about 5 months due to ****ty north dakota winters . the only thing i have done to it in its whole life is oil and air filter changes. I live in a smaller town, and the nearest jaguar dealer is in canada so i do not know where to get the plugs and everything worked on. Can a ford dealer do this work since its a 1998?
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Wayne:
Not necassarily. It might be the relay that drives it, the inlet screen, the fuel filter and so on. And it might very well not be the fuel system. You have enough matching symptoms to check it though, since you have no OBD codes. I mention the fuel pressure because it sounds like it might be fuel starving at high load.
The XJR has two fuel pumps. They are in the tank, and the second one kicks on when needed. Fuel presure should be about 39 psi above manifold pressure.
Not necassarily. It might be the relay that drives it, the inlet screen, the fuel filter and so on. And it might very well not be the fuel system. You have enough matching symptoms to check it though, since you have no OBD codes. I mention the fuel pressure because it sounds like it might be fuel starving at high load.
The XJR has two fuel pumps. They are in the tank, and the second one kicks on when needed. Fuel presure should be about 39 psi above manifold pressure.
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if i hit the accelarator hard from a dead stop, the car does just fine, no lagging or anything. but if im driving about thirty miles an hour and punch it, it staggers. The car has been sitting in storage for about 5 months due to ****ty north dakota winters . the only thing i have done to it in its whole life is oil and air filter changes. I live in a smaller town, and the nearest jaguar dealer is in canada so i do not know where to get the plugs and everything worked on. Can a ford dealer do this work since its a 1998?
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i plugged my obd2 reader in and the only thing it showed was p1000. There are three different colored lights on the reader, and mine showed yellow, which means "a possible obd2 code detected but could not be determined". The car does downshift just fine when i get on the acceleration, the car lags from 2k to 5k rpms, then after 5k it takes off fast just like it usually would.
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