04-29-2012, 04:20 PM
Join Date: Mar 2012
Total Cats: -11
DIYPNP MS1 and the fuel pump
I'm installing a DIYPNP unit, the MS1 version, into my car. This was a unit that was built for a 90-93 (like mine) around 2009, by Braineack from the forums here.
Despite some small customizations I'm doing on the install, I'm following most of the instructions that I was given (and that the previous owner was given by Brain), and they say that if you're a 1.6 owner, you must wire a small shunt between F/P and GND, in your diagnostics plug. This was on Brain's instructions. However, reading the instructions on legacy (MS1) MSPNP from the diyautotune.com website, they say that the ST_SIGN 10 amp fuse should be removed... So, my question is...
Can I remove the fuse instead of jumping the diagnostics connector? Does it do the same thing?
Should I do both things? (unlikely since removing the fuse wasn't in the original instructions).
The only reason I ask is because I feel a lot safer removing that fuse than wiring the diagnostics box and having the small shunt fail me at a later point.
Also, just for curiosity... What does removing the fuse do? And what does the F/P to ground jumper do?
If anyone could help me with this, I'd be greatly appreciated!