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Author
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Topic: 92 5.0 Tachometer malfunction!
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5dean0
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Member # 4623
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posted
 
 
Everytime i start my car the needle on my tach shoot's up o 4000 rpm and stay's there. I cleaned the TPS, check for vacum leak, and my last source of problem would be the ignition switch. But before that, anyone here had this similar problem? please i need help! Thanks!!!!
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92 LX 5.0L Stock
06 IS 250 RWD
Posts: 91 | From: North Bay Area | Registered: Jun 2004
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Blind
2.3L
CAFords OG
Member # 3052
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posted
if it's just the tach shooting up high and the engine sounds like it's idling normally than the tach has failed and you need a new gauge.
if the engine is really idling that high then you have a very large vacuum leak, check the PCV or the brake booster vacuum lines from the intake manifold.
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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Secnd2nun64
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Member # 1431
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posted
I remember when my 5.0 use to do that! One time it went strait up and then fell over to the other side of the guage. lol
Your going to need to get a new cluster. Can always just disconnect it and run a tach on the dash.
Posts: 1460 | From: CA | Registered: Jun 2002
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rollininmy50
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Member # 9067
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posted
someone told me to replace the temp sensor, my 88 did the same thing, runs fine now.
Posts: 439 | From: sactown | Registered: Apr 2009
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5dean0
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Member # 4623
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posted
Thanks to all the possible solutions! My Idle is 100% Normal it's just the tach that is malfunction, I will follow all these advise, worst comes to worst I just get a new cluster.
Thanks! ![[Smile]](smile.gif)
[ November 05, 2010, 11:14 AM: Message edited by: 5dean0 ]
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92 LX 5.0L Stock
06 IS 250 RWD
Posts: 91 | From: North Bay Area | Registered: Jun 2004
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5dean0
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Member # 4623
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posted
rollinmy50 Where is that Temp Sensor located?
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92 LX 5.0L Stock
06 IS 250 RWD
Posts: 91 | From: North Bay Area | Registered: Jun 2004
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Blind
2.3L
CAFords OG
Member # 3052
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posted
quote:
Originally posted by 5dean0:
rollinmy50 Where is that Temp Sensor located?
the temp sensor has absolutely nothing to do with the functions of the tach, all it does is tell the computer when the engine is warmed up so it doesn't idle at ~1500rpm once it's warm.
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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Secnd2nun64
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Member # 1431
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posted
I saw a whole cluster for sale in the "FORD SALE" section. Get that one or go hit pick n pull this weekend. They dont cost much.
Posts: 1460 | From: CA | Registered: Jun 2002
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vendicated_03gt
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Member # 9815
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posted
had similar problem on my bois 91 5.0, as soon as we intalled pullies.after to start ups at the third one the tach stopped working .. wat can be wrong it has always worked.. wat could it be ?
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"Vendicated Tuning"
03 Mustang gt
o/r xpipe,cat back, AEM intake, C&L mass, 3.73 gears, PP tb,PP Elbow
Posts: 616 | From: Cen*Cal 209 Manteca-Los Banos | Registered: Feb 2010
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