Cluster swap: stuck tach?
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Joined: Nov 2012
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From: Wisconsin
Cluster swap: stuck tach?
Hi guys,
I just bought a '92 F150 with the 300 six. It didn't have a tachometer so I bought a '92-93 cluster with a tach, swapped in the original speedometer, and installed it.
All the gauges and lights work, but the tach won't work properly. When the truck is off, the tach returns to zero like it should. But when the engine is started, the tach immediately jumps up to 2100 rpm and is stuck there. Any rpm's higher that 2100 and it works normally, it just wont show rpm's below 2100.
I thought that the cluster might have something wrong with it but the other day it randomly started working and showed all rpms, it idles correctly at like 1000. But now its stuck back at 2100 again.
Is there something simple that can be fixed to solve this? or should I just return the whole cluster and try to find another one?
I just bought a '92 F150 with the 300 six. It didn't have a tachometer so I bought a '92-93 cluster with a tach, swapped in the original speedometer, and installed it.
All the gauges and lights work, but the tach won't work properly. When the truck is off, the tach returns to zero like it should. But when the engine is started, the tach immediately jumps up to 2100 rpm and is stuck there. Any rpm's higher that 2100 and it works normally, it just wont show rpm's below 2100.
I thought that the cluster might have something wrong with it but the other day it randomly started working and showed all rpms, it idles correctly at like 1000. But now its stuck back at 2100 again.
Is there something simple that can be fixed to solve this? or should I just return the whole cluster and try to find another one?
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New User
Joined: Nov 2012
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From: Wisconsin
Ive had a hard time finding a 92-93 cluster that isnt destroyed, all of them are in trucks with no windows so everything is soaked
Definitely wasnt a diesel, it was a f150 with the 351 IIRC
Definitely wasnt a diesel, it was a f150 with the 351 IIRC
Fleet Owner
Joined: Aug 2005
Posts: 23,667
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From: Easton,Ks
First off make sure pin #10 of the cluster plug C250 is not grounded. It is only grounded in V8 engines.
Second I would get any cluster with a tachometer from 1992 to 1996 F-series or Bronco and take the tachometer out of it and put it in the 1992 cluster you have now.
I think a diesel uses the same IP cluster.
Second I would get any cluster with a tachometer from 1992 to 1996 F-series or Bronco and take the tachometer out of it and put it in the 1992 cluster you have now.
I think a diesel uses the same IP cluster.
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New User
Joined: Nov 2012
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From: Wisconsin
Which pin is #10?
I might try to swap in the '94 tach I bought to see if that works, I doubt it though since the 94 has a battery light in the tach and the '92 doesnt. '92 says "REAR ABS" and the 94 says "ABS" but I doubt that will make a difference
I was just going to return it because it was slightly different but I will give it a try
I really appreciate the help guys!
EDIT: I installed the '94 tach and for the 10 seconds that I ran the motor it seemed to work fine, I'll get to test driving it in the next couple days once some parts some in
I might try to swap in the '94 tach I bought to see if that works, I doubt it though since the 94 has a battery light in the tach and the '92 doesnt. '92 says "REAR ABS" and the 94 says "ABS" but I doubt that will make a difference
I was just going to return it because it was slightly different but I will give it a try
I really appreciate the help guys!
EDIT: I installed the '94 tach and for the 10 seconds that I ran the motor it seemed to work fine, I'll get to test driving it in the next couple days once some parts some in
Fleet Owner
Joined: Aug 2005
Posts: 23,667
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From: Easton,Ks
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New User
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i have a 1985 f150 efi 5.0 did the same swap and it only reads to 3k no higher mine is a xl no tach got it off a f150 xlt same engine.havent been around this forum bcuz my other project is a 1991 q45 with a broken chain on drivers side haven alot of difficult times with that.but i did get a set of 15 american racing wheels for the f150 the same day i bought the cylinder head for the infinity.looks great.
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