88 ford truck problems
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From: Maple Grove, PA
88 ford truck problems
i have a 302 bored 40 over and stroked to a 357.
1. appon starting the truck the tach will fluctuate from about 500 rpm. to 1000 rpms.
2. it looses power when on the gas light.
a. it bucks a little
b. looses power but if i get on the gas hard it goes
away but returns when i get on the gas light again.
i am confused about what to do to fix the problem
i changed plug wires and plugs and figured i would see if anyone else has encountered the same problem and see what i can do to fix it.
thank you for the information
Gui88ford
1. appon starting the truck the tach will fluctuate from about 500 rpm. to 1000 rpms.
2. it looses power when on the gas light.
a. it bucks a little
b. looses power but if i get on the gas hard it goes
away but returns when i get on the gas light again.
i am confused about what to do to fix the problem
i changed plug wires and plugs and figured i would see if anyone else has encountered the same problem and see what i can do to fix it.
thank you for the information
Gui88ford
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Joined: Mar 2000
Posts: 425
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88 ford truck problems
That sounds like an intake manifold vacume leak, try hooking up a gauge and see if it holds a steady vacume at idle (around 20-30 psi if I remember mine) if it doesn't, take off the upper and lower intakes and reseal the gaskets with some orange pcv, pvc, something like that rubber gasket sealer for high temp areas.
1995 F-150XL SC/SB
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5-Star Rated F-150 (Big Stereo)
1995 F-150XL SC/SB
http://members.sounddomain.com/blind
5-Star Rated F-150 (Big Stereo)
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88 ford truck problems
Check your 02 sensor (located in the catalytic convertor in exhaust system). I had the same problem with my mint '89 302. I have a Hypertech chip and custom exhaust (Bassani, Flowmaster)- no cats, now. I put a new Bosch 02 sensor in the exhaust pipe directly after the header collector and in front of the flowmaster on the passenger side. Problem went away.
litespeed
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From: Maple Grove, PA
88 ford truck problems
thank you for the information. I have to find a guage and check for the vacume leak.
to the other reply...yes i have dual exause also so my o2 sensor is in the pipe after my header collector like yours is;but,that would also cause the truck to do what it is doing but not to this extent.
thank you all for the information
Gui88ford
to the other reply...yes i have dual exause also so my o2 sensor is in the pipe after my header collector like yours is;but,that would also cause the truck to do what it is doing but not to this extent.
thank you all for the information
Gui88ford
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88 ford truck problems
You say stroked right..well...I'm thinking a hot cam as well as increased compression also, which , will call for increased fuel pressure via a hp adjustable fuel regulator and a set of hp injectors. You should also verify TPS is OK and increase the idle voltage by adjusting the TPS. The MAP has a lot to do with acceleration as well, but is unadjustable, but you can install a resitor in the reference wire to fool the computer as to the engine load. One site I remember that dealt with stuff like this is http://www.rangerstation.com. They do a lot of mass air conversions, but they have a lot of helpful tips on speed density(MAP)
Phil
Phil
