danbyrambler Posted October 2, 2012 Share Posted October 2, 2012 FWIW - - - Thought my stock 87 4.0 AW4 MJ was running ok - 19-20mpg & then read a post about replacing the auto idle speed motor even though . . . .Another post somewhere about TPS problems prompted a check before enough miles were logged to judge the new IAC install. . . . . New TPS time . . . . .Seemed like the new IAC & TPS made a bit of a dif & then my dash lights grew a little brighter & then went back to normal - normal for my truck - & so now it's time to ck grounds & everything seems ok but, remembering some problems with other makes & my 1st instructor back in E school who was always saying "THERE'S NO SUCH THING AS TOO MUCH GROUND", I ran a #2 strand from battery neg to PS radiator top brace/header & then another from DS brace/header to Pwr Steering mount - WOW, seems there was a ground problem somewhere - Readjusted the TPS & Trans shifting is noticeably better & 20-21 mpg - - - I normally avoid the shotgun approach - don't know what made the biggest dif here but the ground thing seemed to be the catalyst. :wrench: Link to comment Share on other sites More sharing options...
MiNi Beast Posted October 2, 2012 Share Posted October 2, 2012 may have to try that with my baby MJ seems to be acting the same way latly just been to focused on big jeep to deal with dd. lol better look into it. thanks for this tid bit. :thumbsup: Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now