4.2 issues

SleeperStang88 · October 15th, 2009, 09:42 PM

well i have the 4.2 in and now im having issues when WOT it will not shift.....i have an automatic and it seems at 4-5 grand it seems to bounce likes it hitting the rev limiter and will not shift unless i let off the gas
now i deleted the egr....and my mechanic tells me that the egr has vacuum lines that control the up and down shifting ....any ideas?

Codeman · October 15th, 2009, 10:42 PM

hmm... idk if the egr has any lines that connect into the automatic transmission. Umm did you put the motor in? if so you may have not connected all of the vacuum lines to the tranny. does it shift regularly?

RFM 40th V6 · October 16th, 2009, 01:34 AM

Trans shift point are electronically controlled as far as I know.

The EGR wouldn't have anything to do with this. Double check that all your connectors are attached. More than likely it's a wiring problem.

Did you change anything in the trans?

SleeperStang88 · October 17th, 2009, 10:43 AM

i did not put it in myself, i had my mechanic do it, but it does shift normally when i drive it normal.....just wot is when it will not shift

RFM 40th V6 · October 17th, 2009, 05:21 PM

Check out the TPS. Make sure that it is seeing the correct voltage at WOT.

slvr2000stang · October 19th, 2009, 09:22 PM

Originally Posted by SleeperStang88

my mechanic tells me that the egr has vacuum lines that control the up and down shifting ....any ideas?

No it does not.
And a mechanic saying something so far off like that would scare me.

October 15th, 2009, 09:42 PM	#1
SleeperStang88 Regular 2000 Mustang V6 need to run at track Join Date: Sep 2008 Location: Michigan Posts: 355 iTrader: 2 reviews	4.2 issues well i have the 4.2 in and now im having issues when WOT it will not shift.....i have an automatic and it seems at 4-5 grand it seems to bounce likes it hitting the rev limiter and will not shift unless i let off the gas now i deleted the egr....and my mechanic tells me that the egr has vacuum lines that control the up and down shifting ....any ideas? __________________ _____________________________________________ 4.2 H/C/I with LT headers, sitting on 315s

October 15th, 2009, 10:42 PM	#2
Codeman Hardcore Enthusiast Join Date: Nov 2007 Location: North Dakota Posts: 2,933 iTrader: 1 reviews	hmm... idk if the egr has any lines that connect into the automatic transmission. Umm did you put the motor in? if so you may have not connected all of the vacuum lines to the tranny. does it shift regularly? __________________ UDP, CAI, True Duals, LTs, 91 Tune from TT, 3.73 gears, Tlok,Windstar upper, GT TB, Ported lower, Comp 218/226 cam, FRPP C Springs, J&M LCA, Tokico Blue shocks and struts, and J&M Full Length Subframe Connectors

October 17th, 2009, 10:43 AM	#4
SleeperStang88 Regular 2000 Mustang V6 need to run at track Join Date: Sep 2008 Location: Michigan Posts: 355 iTrader: 2 reviews	i did not put it in myself, i had my mechanic do it, but it does shift normally when i drive it normal.....just wot is when it will not shift __________________ _____________________________________________ 4.2 H/C/I with LT headers, sitting on 315s

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