March 25, 200818 yr i have replaced both speed sensors with new subaru parts and 3 different clusters, all to the same effect, BOUNCY SPEEDO seems to work as long as my foot is on the accelerater ???????????????????????????????????? j
March 25, 200818 yr Are the other gauges functioning normally? Does your vehicle shift ok, no jolts or hesitation? Is the bounce of the needle consistant or varies wildly? Does the bounce occur if you manually put the transmission in 1st, 2nd, 3rd, Drive, Reverse? Does the CEL come on? Describe what happens when you take your foot off the pedal, does the needle fall back to zero? Possibilities: Intermittant break in the cable or connector to sensors or gauges An issue with the ECU/TCU with regards to the signal coming from the VSS sensors. Problem with the mechcanical "tab" drive mating the tranning to VSS-2 Long shot - try discconnect battery to reset ECU Other than that I don't know what to tell you to try. Anyone else....?
March 26, 200818 yr Author as long as my foot is on the accelarater it will hold at the speed im going(i think) as soon as i let off, it will drop to zero now on occasion it will hold, but not often so when i am in traffic it starts bouncing becouse im off and on the pedal seems to work the same in any gear trans seems to shift good, motor is running tops scanner is saying the fuel, exhuast, ign, all operating good all seems good except the speedo and the a/c but god only knows whats wrong with that
March 28, 200818 yr Author what year/model/engine/transmission? that makes a huge difference...~Erik~ 1997 legacy outback 2.5l 4eat what do you think you know i have run out of ideas
March 28, 200818 yr Nylon drive gear on the differential is buggered. Yup, the torque from the engine may put just enough twist on the shaft and bearings to make good contact with the VSS. Eventually this wont work anymore either. nipper
March 28, 200818 yr Author i can live with this what the new problem is this code 1507 idle control valve issue new post....
March 28, 200818 yr Author Neutral saftey switch. nipper yeah i ordered one, monday but all the posts i read refer to the 5mt with this problem and i got a 4eat, is the part the same i wonder???
March 28, 200818 yr Author whats a NSS??? oh a nuetral safty switch i should be spade but is it the exact same part to have the same failure
March 28, 200818 yr Author oh a nuetral safty switchi should be spade but is it the exact same part to have the same failure but i guess also the ecu/tcu use the signal the same way regardless if its the eact same part......
March 28, 200818 yr It still has a NSS nipper That function is built into the gear selector indicator. Actually a Park/Nuetral safety switch. The ECU just uses the signal for the P and N lights. I don't think it's failing would cause an idle issue on an automatic. I would think it's a a problem with the IAC
March 28, 200818 yr Author That function is built into the gear selector indicator. Actually a Park/Nuetral safety switch. It just uses the signal for the P and N lights. I don't think it's failing would cause an idle issue on an automatic. I would think it's a a problem with the IAC search 1507, its not the iac
March 28, 200818 yr Tht switch is P R N D 3 2 1. It has many uses. Its not a just a start interlock switch. It also tells the TCU and ECU what gear the car is in. It just doesnt turn lights on and off. nipper
March 28, 200818 yr Author Tht switch is P R N D 3 2 1. It has many uses. Its not a just a start interlock switch. It also tells the TCU and ECU what gear the car is in. It just doesnt turn lights on and off. nipper but when i ordered it, it was a different part
March 29, 200818 yr Tht switch is P R N D 3 2 1. It has many uses. Its not a just a start interlock switch. It also tells the TCU and ECU what gear the car is in. It just doesnt turn lights on and off. Actually that is all it does, is complete contact for each position. Now some of the positions(P/N) are wired in to the ECU and Cruise, etc..., but just as signal. The ECU sees voltage at a certain pins(when the light for that gear is illuminated) and interpruts it. The switch itself is nothing but simple sets of contacts. Splitting hairs I guess. I just wanted to point out that this part doesn't have *logic* or any computing function. One could test if a poor connection in the switch was culprit by simply using jumper wires to simulate the switch being closed for a given circuit (P, N, D, etc...)
March 29, 200818 yr search 1507, its not the iac It is: IDLE CONTROL SYSTEM MALFUNCTION (FAIL SAFE) What do you think control the idle? The Idle Air Control Vavle (IAC)!!! It is not the only possibility, but a good place to start. Perhaps it has a loose hose? Loose connection? You can't just dismiss it without checking it.
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