Roush speedometer reads 10 fast

[SSS281]

just got the car back i noticed it seemed like it was reading fast. then today i went past one of those construction radar things i was going 80 it said 70. how all of a sudden would it go off? it read fine before.

 

[Mstng2]

just got the car back i noticed it seemed like it was reading fast. then today i went past one of those construction radar things i was going 80 it said 70. how all of a sudden would it go off? it read fine before.

Only two things can change it. Your needle slipped on the peg, or the computer was flashed to a different gear ratio/tire size. So here's what you need to do to help narrow it down. Hold in the speedo odometer select button and keep holding it in while you start the car. This puts the guage cluster in diag mode. You can then push/select through different parameters. go through untill your on the speed reading and run the car up to 60 MPH. Does the speedo needle read 60? then its the computer, or the construction radar was whacked. Check this by using a stopwatch and see if 1 mile ='s 1 minute at 60 MPH if this is the case your accurate. if none of this pans out your needle is off somehow.

 

[SSS281]

Only two things can change it. Your needle slipped on the peg, or the computer was flashed to a different gear ratio/tire size. So here's what you need to do to help narrow it down. Hold in the speedo odometer select button and keep holding it in while you start the car. This puts the guage cluster in diag mode. You can then push/select through different parameters. go through untill your on the speed reading and run the car up to 60 MPH. Does the speedo needle read 60? then its the computer, or the construction radar was whacked. Check this by using a stopwatch and see if 1 mile ='s 1 minute at 60 MPH if this is the case your accurate. if none of this pans out your needle is off somehow.

thanks for the info, ill give that a try...the needle was fine before so im not sure how either wouldve all of a sudden gone out of whack. the engine was pulled and rebuilt is there a chance something didnt get hooked back up right?

 

[Mstng2]

I wouldnt think so but strager things have happened. You might check the harness and see if any wires under there got pinched. But do the simple test I outlined first, then go from there.

 

[00-Saleen]

Hows it feel to be drivin your saleen again?

 

[Mstng2]

Hows it feel to be drivin your saleen again?

Yea FST FORD what ended up being the problem?

 

[SSS281]

i spun two bearings along with many other little things, clutch was gone, intake manifold cracked. itd great to be driving it again if i wasnt 99.9% sure my new clutch isnt installed right. it jolts and bucks all over the place. i know i havent driven stick since august but i didnt forget how; were getting it sorted out. i want to have some videos up soon for you guys

 

[00-Saleen]

Videos would be sweet.Ill have some made here shortly to.