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Username Post: Engine light on.. fast idle.. no auto shift        (Topic#358396)
Lostangyl 
Poster
Posts: 3

Reg: 10-10-19
10-10-19 10:29 AM - Post#2777561    

Hey guys.. so 95 g20 van 5.7.. yesterday started van.. engine light came on ... Idle seemed fast.. no power in OD.. shifted manually to 1st and no problem.. won't shift by itself. Have to shift manually.. even then seems to only have 2nd and drive.. over drive will not ingage.. and in first gear shift manually to 2nd.. no shift.. any idea?




 
Shepherd 
Frequent Contributor
Posts: 2148

Loc: Lake George, NY
Reg: 11-11-15
10-10-19 01:49 PM - Post#2777582    
    In response to Lostangyl

Get it scanned post back with the code.



 
65_Impala 
Very Senior Member
Posts: 4548

Reg: 12-29-02
10-10-19 02:40 PM - Post#2777584    
    In response to Lostangyl

Get the codes.

The 4L60e will only have manual 2nd and 3rd gear when it loses power or the PCM quits controlling the solenoids. Both shift solenoids off puts the transmission in 3rd gear and it has circuits which over-ride the solenoids and force manual 2nd when you put the gear selector in 1st or 2nd gear.

So, check fuses and the wiring.





 
Lostangyl 
Poster
Posts: 3

Reg: 10-10-19
10-10-19 08:00 PM - Post#2777611    
    In response to 65_Impala

So pulled POS battery cable and.. reset.. so far problem solved.. limp mode.. question is why? Neg cable was loose yesterday.. but tighten it.. maybe bad ground?



 
junkman104 
Frequent Contributor
Posts: 1528
junkman104
Age: 61
Loc: Murphy N.C.
Reg: 01-25-14
10-11-19 03:52 AM - Post#2777630    
    In response to Lostangyl

Had a 95 Tahoe a couple months back doing the exact same thing. Ignition switch (electrical part) was the problem.



 
Lostangyl 
Poster
Posts: 3

Reg: 10-10-19
10-11-19 09:28 PM - Post#2777704    
    In response to junkman104

So far so good.. drove all day today.. hoping it was just cause ground was loose




 
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