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Upgraded from 1.34 to 2.002 and thought I'd try the boost controller. I'm set to Map mode and slew is 1000 Pos. and 1000 Neg. PID is set at P=80 I=30 D=30 and the boost table is set to 65 strait across 0 tps to 100 tps. The problem I'm having is the boost duty cycle stays at 100 until 14.5 psi...

Need advice on my front speakers. A little back ground i just replaced my H.U. with a Kenwood KDC-x595 that has (22 watts RMS CEA-2006/50 peak x 4 channels) a JL 10w3v3-2 and a JX500/1 amp. 2 4x10's in the rear running off the H.U. Here's the question going to build speaker pods in the lower...

I need to know the mounting length of the stock rear lower control arms. Like a center to center measurement. Thanks for any help.

Ok I need some help I made a big mistake hooking my XFI up to a boost solenoid. I am using a Casper’s adapter so the solenoid hooks up to the factory wires. Well I tested the boost wires and I had 14vdc on both wires so at that point all was good. Well that’s were it all went bad the solenoid...

I need to know if you can switch programs with the key in RUN and ENGINE OFF or does the key need to be in the off position when you select the tune. I know the engine has to be off but I don’t know if it works like C-Com were you change with key in run. Thanks In Advance

I’ve made my mind up to try the closed loop boost controller on the XFI. I need to know what solenoid I should use? Should it be plumbed as a bleed type or in-line?

I noticed today that the Cam Sync Flag value at idle will flash from 1 to 0. It only stays on 0 for 1 sec or so. I was wanting to know if this is normal or not. I’ve got a intermitting miss at idle that I been looking for and didn’t know if could have something to do with it. Thanks for any help...

What’s the best way to fine tune the target A/F ratio table in XFI? I’ve used the recommended settings from the chart in the help file but I would like dial it in for my motor. My motor cruises fine at 14.7 and even at 15.0 but how do I know if that is to lean or not lean enough. Could I use EGT...

A friend gave me a set of QUICK TIME PRO D.O.T. 27 x 11.5 – 15 I’d like know if they will fit under a stock rear 87. If yes what size rim and back spacing do you think it will take? The finder lip is all ready rolled. Tire specks https://www.hoosiertire.com/Drtire.htm

Installing XFI this weekend (If my wife doesn’t have something for me to do) I was hoping to get a list of things to look out for mistakes that others have made like O2 placement, Inlet air temp placement and any other thing you can think of. I am using the plug and play adapter. Any help is...

I was loading up the converter in the driveway when it made a noise. I let my foot of the gas and held the brake in gear and there was whining noise from the trans area only in gear with the car not moving. I replaced the converter with a pats 12" 2600-2800 and the whining went away.:) But the...

I can't get the turbo to spool more than 1 maybe 2 # of boost on the line. I was trying to launch the car a few months back and I was making 7 or 8# of boost at about 1600 or 1700 rpm but before I could let off the brake there was a noise and the converter started to whine. I replaced the...

I think I brook my stock converter trying to lunch the car in the driveway. The converter was loading up to 1600 rpm and spooling to 7 lb. I need a new converter put I don't know what Stall or Brand to buy. The car is 98% street driven and I drive it every day so reliability with out breaking...

I have a 87 GN with a blown head gasket. I was getting ready to tear down the head when I found out I have head stud. Now I have to pull the motor out. Did the factory use head studs or did someone take this head off before. Also head gaskets some say us Fel-Pro 9441-pt some say only use...