Fuel pump and tach plugged in???

[Purple87SS]

Where are the two connected??I want to unplug them to see if the tach works again. Pics below..can some one circle it for th dummy. Thanks!!!

 

[pacecarta]

check where circled for the two connectors , one is a green and one gray , one is male and the other female and the exit the harness at the same place and could have mistakenly been connected causing a redlined tach

if they arent connected and you want it to again work plan on sending the tach boost unit to john casper , you can find out more at his site ... https://www.casperselectronics.com

 

[Purple87SS]

awesome, I was looking higer up behind the alt.

Going try it tommorow to see what happens.

Thanks!

 

[Purple87SS]

no luck

Well I looked under the hood today before work, I saw two connectors one green and one gray( I forget which was a male and which was a female) But they were not plugged into each other. I looked closely and saw no other connection behind there. Looks like I have to send out the cluster for repair. Now if I choose not to, can I just plug in an Autometer tach in the proper plug and have a more accurate working tach?

 

[pacecarta]

well you dont need to pull the whole cluster just the tach boost module
the instructs should be on johns site



i personally never use the stock tach or boost , too hard to see and my tach was always off anyway by about 600 rpm and with alky due to the 3bar map sensor my stock boost gauge is now a 6-30 psi gauge but its useless as well for any accurate reading.
boost should be monitored on an aftermarket gauge , i like autometer 30/30 sport comp myself

you can add a tach using that connector ( the one with a female end)
for tach but unless your shifting yourself theres really no reason for one.
get a scanmaster and it has a tach mode on it if you want to check on your shiftpoints and trap rpm , you should have an SM anyway for knock and O2 monitoring.
i record my runs on the 87 with directscan so if the trans were not working correctly on the shifts I would know ,

on the 86 i record runs as well but have to shift 2-3 and 3-4 , I have a VDO 3" tach in the gnx style dash and it works good but even with that its easy to go 100-200 over on the shifts or even be just a bit early anticipating the delay in shift , in my case I would be better off with a shift light,

I plan on adding shift light tach like this one that a buddy is running

http://store.summitracing.com/partd...W-114906&N=115+4294925228+400827&autoview=sku

or this one

http://store.summitracing.com/partd...W-114929&N=115+4294925228+400827&autoview=sku

whats nice on these is the shift light is programamble without the pill modules so its easy to change.