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jacktoff69
GenIII
 
10/24/2006
23:15:20
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 Subject: V8 tb reving problems
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Message:
after changing the tb my roms keep fluctuating back and forth from a slightly higher rpm because of the bigger tb but also a drastic 1500 to 2000 rpm. what would be the reasoning 4 this because my computer has had enough time 2 relearn yet does it sometimes here sometimes there isnt really ne change in my driving from one 2 the other. ne info would be great thanks
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Wadak
GenIII
10/24/2006
23:52:31
| RE: V8 tb reving problems
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Message:
The reving is not uncommon after changing from a v6 to v8 tb. What you need to do is restart your truck 3 seperate times, let it run for about 30 seconds each time, then restart. By doing this you are allowing the computer to adapt to the new throttle body. If it continues after this the pull the negative battery cable, leave disconnected the turn the key to the start position for about 30 seconds. This performance a hard reset to the computer and will have to adapt to new settings which takes about 200 miles, this should solve the cyclic reving up and down.
92 and 97 Daks both with many mods.
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Mike Stager
Dodge Dakota
JOIN HERE
10/25/2006
21:05:05
| RE: V8 tb reving problems
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Message:
Either that, or you've got a bad gasket leak that's letting it pull extra air in under the high vacuum of idle, though one would expect that the idle would remain higher all the time.
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J and J Auto
GenII
10/25/2006
22:35:01
| RE: V8 tb reving problems
IP: Logged
Message:
vac leak
bad tps or IAC
did you use the correct V8 body
92 to 95 egr must use 92 to 95 v8 body
96 and up non egr type
this will also cause idle issues
I hope you used a new gasket only like $1
remove the IAC back of TB and use a little oil
on the oring I have also seen this happen all
it takes is a small leak
there is one more thing that happens but is rare
the plates are bent or just open to far if this is
the case you must drill out the plug and close
them a little right where an idle adjustment
would be on a carb
IAC should be around 15 obd1 30 obd2 steps read
with scanner
Also did you use all your old sensors knowing
they were ok over tighteng the tps can also
cause it to stick center wire and ground key on
engine off open and close throttle and make sure
it always returns to the same low volts between
.3 .8 .75 being the optimal setting but must
always be the same
Larry
J&J Auto
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jacktoff69
GenIII
10/26/2006
19:19:48
| RE: V8 tb reving problems
IP: Logged
Message:
ya so it was a new gasket and the same sensors althe way around so ill just take the m out and oil iac oring and put in a un modified tps and check gasket again.
thxs
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