iQuad Boost Readings Lower than Boost Gauge

[Cummins4life]

6 hours ago, Mopar1973Man said:

I don't rely on the Quadzilla for gauges. This is why I like going headless. Boost (varies as boost climbs), pyrometer (+50*F to my ISSPro EV2 gauge) or vehicles speed (-1 MPH always compared to GPS). In my truck, all 3 of these gauges are off. 

Thanks yeah I ordered a set of glow shift pillar gauges to put in. Boost, pyro, and fuel I just plan on using the quad to change stage levels and programs. I’ll still have the chip plugged into the egt sensor and making a pig tail to have both quad and pillar reading   

[Cronus577]

On 9/4/2018 at 9:54 AM, Mopar1973Man said:

Known problem mine is the same way. I'm also running expensive ISSPro EV2 boost gauge.

Also running the ISSPRO EV2 gauge in my truck. I'm showing about 15 PSI on the gauge when my Quadzilla shows 8 or 9 PSI. I have a new MAP sensor coming in tomorrow and will be putting it in to see if that changes anything. I'll keep you updated.

Edited October 30, 2018 by Cronus577

[Cronus577]

Just put the new map sensor in and now the quadzilla is reading the same as the isspro gauge. Feels like I got all of my low boost power back and the turbos aren't as laggy

[Cummins4life]

I’ll get another map sensor and try it. I just installed the pillar gaugesast night and I think I need to do some checking for the I made a video so you could see what the egts and fuel pressure are doing. For the egts I took a temp gun and the manifold was reading 230 but this is what the gauge was reading. 

[Me78569]

glowshift is known for issues.  that is what I would check out first.

[Cronus577]

4 hours ago, Cummins4life said:

I’ll get another map sensor and try it. I just installed the pillar gaugesast night and I think I need to do some checking for the I made a video so you could see what the egts and fuel pressure are doing. For the egts I took a temp gun and the manifold was reading 230 but this is what the gauge was reading. 

7DC4159C-F792-4477-9AB8-EA70AC8ADC1B.MOV

At idle when cold the truck should be around 400-500* on the pyro. When you installed the fuel pressure gauge did you put on a snubber valve?

[Mopar1973Man]

Glow shift gauges are cheap quality...  Time to upgrade to quality gauges.

 

Wandering needles is most likely a bad gauge, bad ground wiring, bad power wiring, etc.

[Cummins4life]

10 minutes ago, Cronus577 said:

At idle when cold the truck should be around 400-500* on the pyro. When you installed the fuel pressure gauge did you put on a snubber valve?

Yeah I installed the snubber valve on. The wire I have double checked. The gauges are brand new just got them out of the box yesterday.

[Me78569]

The quality of glow shift is not good enough for me to trust that it isn't bad out of the box.

[Cummins4life]

I’m wondering if the sensor isn’t bad for the fuel. I adjusted the snubber and it runs at 18 then drops and then gos back to 18psi 

[dripley]

1 hour ago, Cronus577 said:

At idle when cold the truck should be around 400-500* on the pyro.

Just curious about this. My truck never see 400-500* at idle, cold or warm. Mine maybe sees 300* on cold starup. The EB will bring it up in the 450 range. Idleing in summer time on warm engine i will only see 250 maybe 275.

Edited November 1, 2018 by dripley

[Cummins4life]

8 minutes ago, dripley said:

Just curious about this. My truck never see 400-500* at idle, cold or warm. Mine maybe sees 300* on cold starup. The EB will bring it up in the 450 range. Idleing in summer time on warm engine i will only see 250 maybe 275.

Idling my truck sit between 230 and 250 all the time.

[Cronus577]

39 minutes ago, dripley said:

Just curious about this. My truck never see 400-500* at idle, cold or warm. Mine maybe sees 300* on cold starup. The EB will bring it up in the 450 range. Idleing in summer time on warm engine i will only see 250 maybe 275.

 

29 minutes ago, Cummins4life said:

Idling my truck sit between 230 and 250 all the time.

Well then, looks like I might have to dig around and see if there's an issue on my end. I've never seen anything lower than maybe 350 and that was in 15* weather in the middle of winter. Mind typically sits at 400* cold idle and 450-500 warmed up. 

[dripley]

2 hours ago, Cronus577 said:

 

Well then, looks like I might have to dig around and see if there's an issue on my end. I've never seen anything lower than maybe 350 and that was in 15* weather in the middle of winter. Mind typically sits at 400* cold idle and 450-500 warmed up. 

My thermocouple is in the back half of the exhaust manifold outlet to the turbo. 

[Cronus577]

13 minutes ago, dripley said:

My thermocouple is in the back half of the exhaust manifold outlet to the turbo. 

I have mine in the egt tap on the BD 3 piece manifold

[dripley]

Just now, Cronus577 said:

I have mine in the egt tap on the BD 3 piece manifold

 I would think some place in the vicinity of this?

 

[Cronus577]

12 minutes ago, dripley said:

 I would think some place in the vicinity of this?

 

Yup, almost exactly in that location

[Dieselfuture]

2 hours ago, dripley said:

 I would think some place in the vicinity of this?

 

How is your turbo still looking so good after all these years and miles, mine was half rotten with only 150some k on it. 

[dripley]

3 minutes ago, Dieselfuture said:

How is your turbo still looking so good after all these years and miles, mine was half rotten with only 150some k on it. 

I dont know. After 17 years it kind of looked crappy to me. Still works fine best I can tell but most tlikely needs a rebuild. 455k miles on it+many hours of idle. Still no play in any direction in it.

[Cummins4life]

So after doing some checking it is actually my fass that causing my fp gauge to read that way. So I’m going to call fass in the morning about it. Now my egt gauge I still can’t explain y it’s off. One of the guys I work with has one that he is going to let me use to see if it the gauge or not. I changed the plug on the to the gauge so that way I could use the quad if I wanted too. But by changing the end it shouldn’t have effected the reading I wouldn’t think would it have? Any thoughts?