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Engine Specific Info and Questions => IDI Engine => Topic started by: alex17young on February 20, 2013, 09:35:17 pm

Title: quick electrical question
Post by: alex17young on February 20, 2013, 09:35:17 pm
I bolted up my manifolds, t3, and pan from my TD onto my NA in my car over the weekend, I'm very impressed! I installed my Autometer EGT and boost gauges tonight. I used a fuse tap for the keyable 12v power, currently using the rear windshield wiper socket since my car no longer has a wiper in the rear. The boost gauge works great, the EGT gauge flutters from 0-600 at idle, my car vibes alot even with the new motor mounts and I don't want to damage the new gauge. Where should i use 12v power from? The gauge seems accurate about 25% of the time.
Title: Re: quick electrical question
Post by: theman53 on February 20, 2013, 09:44:24 pm
sounds like the probe may need grounded? IDK, I have seen autometers that do need a ground. My aircraft spruce did not, but I have heard of issues with electric ones like you have and all seem to point to a direct ground being needed.
Title: Re: quick electrical question
Post by: alex17young on February 21, 2013, 02:52:13 am
 That's a great idea, I never even thought of that. I'll rig something up tonight and report back.
Title: Re: quick electrical question
Post by: scrounger on February 21, 2013, 08:41:28 am
I'd like to see a pic of your installed gauges.
Tks
Title: Re: quick electrical question
Post by: alex17young on February 22, 2013, 12:26:09 pm
I haven't tried grounding the probe yet, been to lazy lately  ;D. I called autometer, they told me to ground to the motor and clean the threads on the probe lightly. If nothing changes they want to replace the probe. I'll pull it up on the ramps tonight and I'll snap some pics too, they're mounted in the storage slot under my invisible stereo!
Title: Re: quick electrical question
Post by: alex17young on February 23, 2013, 09:58:24 pm
I got my egt gauge working today, pulled off the the heat shrink and both terminals were touching. I guess I used to harness backwards because I had to drill the terminals out a little to fit on the gauge. As far as pics go, my phone doesn't want to send pics to my email for some reason so I'll do what I can.
Title: Re: quick electrical question
Post by: Syncroincity on February 23, 2013, 10:53:33 pm
If it still acts up,  twist and ground one end of the braided shielding, that will eliminate any interference. One end only, leave the other end loose.
Title: Re: quick electrical question
Post by: alex17young on February 24, 2013, 05:21:42 pm
Alrighty, thanks. So far so good, besides hitting 1400* in a short burst! I'm scared to bolt up the TD pump.
Title: Re: quick electrical question
Post by: 8v-of-fury on February 24, 2013, 05:26:04 pm
Alrighty, thanks. So far so good, besides hitting 1400* in a short burst! I'm scared to bolt up the TD pump.

Why?? It doesn't inject any more fuel.
Title: Re: quick electrical question
Post by: alex17young on February 25, 2013, 08:29:50 pm
bigger delivery valves though right? That makes me feel like it can deliver more fuel, it'll find its way under the hood eventually.... I'll have to break down and get photobucket or something my pics aren't working.
Title: Re: quick electrical question
Post by: 8v-of-fury on February 25, 2013, 11:58:52 pm
bigger delivery valves though right? That makes me feel like it can deliver more fuel, it'll find its way under the hood eventually.... I'll have to break down and get photobucket or something my pics aren't working.

Even if they were, which they aren't, that is not what determines amount of injected fuel.

If you have a turbo, a turbo pump will be more beneficial to keep the smoke and EGT's down.
Title: Re: quick electrical question
Post by: vanbcguy on February 26, 2013, 06:40:57 am
bigger delivery valves though right? That makes me feel like it can deliver more fuel, it'll find its way under the hood eventually.... I'll have to break down and get photobucket or something my pics aren't working.

Delivery valves are more like a check valve, they don't determine how much fuel is injected. 
Title: Re: quick electrical question
Post by: R.O.R-2.0 on February 26, 2013, 12:01:01 pm
I got my egt gauge working today, pulled off the the heat shrink and both terminals were touching. I guess I used to harness backwards because I had to drill the terminals out a little to fit on the gauge. As far as pics go, my phone doesn't want to send pics to my email for some reason so I'll do what I can.

i have an autometer EGT gauge.. the harness has an end for the gauge, and an end for the probe, it only works one way, unless you drill out the terminals and install it backwards..

the connections for the probe are staggered so that it is quite impossible for them to touch.. provided you install the wiring harness in the proper orientation..
Title: Re: quick electrical question
Post by: alex17young on February 26, 2013, 05:18:52 pm
^Yup that's how I installed it, I'll fix it someday.