Tachometer and speedometer not working and loss of engine power

ALTERREL0123

MEMBER
1998 FORD MUSTANG
V8
2WD
MANUAL
100,000 MILES

Hello, on my car the speedometer and tachometer only works sometimes. And it feels like it has lost its get up and go. As in when I try to really step on gas pedal it does not take off like a car should if that makes any sense.

Sunday, October 18th, 2020 AT 4:38 PM

4 Replies

BMDOUBLE

MECHANIC
1,139 POSTS

The first place to start would be to retrieve the codes from the PCM (powertrain control module). Also retrieve codes from the instrument cluster module. You may have either a vehicle speed sensor faulty, or your instrument cluster is faulty. Let us know what code retrieved and we can go from there.

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Sunday, October 18th, 2020 AT 8:21 PM

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

Here is a guide to help you retrieve the codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

And the CAN scan:

https://youtu.be/InIlnsjOVFA

Please run down these guides and report back.

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Monday, October 19th, 2020 AT 12:53 PM

ALTERREL0123

MEMBER
6 POSTS

Hello,

Okay, I checked for codes and there are not any coming up at all.

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Thursday, October 22nd, 2020 AT 11:32 AM

KASEKENNY

MECHANIC
18,907 POSTS

The fact that both the speedometer and tachometer do not work some times points to the cluster itself.

Take a look at these attachments. More then likely there is an issue with the circuit board or connections at the cluster. The speedometer and tach are part of the same assembly. So the fact that both stopped working points to the cluster because while they are part of the same assembly they get their signal from separate places. The speedometer gets it from the speed sensor. The tachometer gets its signal from the PCM. The only thing they have in common is the cluster.

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