I have a issue with my Juice I think. I’m not to concerned about it because I’m getting rid of the edge and going back for another Qaudzilla. So i went to check my wire tap and promptly lost the posi tap piece. Ordered a new one and reconnected it and seems rather slow compared to the first time I tapped it?? Any ideas? No codes or anything. Almost seems like a dead pedal but not really. Definitely has more power than without wire tap though so I lm sure it’s getting fuel. Fuel pressure is 18 at idle and 13 15 wot.

what you need to know is in this thread.  it has directions for adding map readings and the equation to the app.

 

 

5 minutes ago, Me78569 said:

what you need to know is in this thread.  it has directions for adding map readings and the equation to the app.

 

 

Looks like what I need to read the map then. 

Sobtonight I’ll go back over everything we’ve talked about and see what I come up with. Anything else to do?

not until you get those readings.

Ok I’ll post back with results asap 

When I hook up the obdlink and see how much boost I get it shouldn’t read over 14 psi?

Remember the OBDLink will read a weird boost number. Like mine starts at 28.6 PSIa and goes to 37.7 PSIa. So it not going to help you figure out what's happening. Even my ScanGauge II does this very same problem.

 

Thing is you should never exceed 20 PSI period. Edge start boost fooling as low as 14 PSI. If the ECM is seeing above 20 PSI it will start to defuel as well. The P0234 code is typically tripped after about 23-25 PSI.

 

The only thing I could suggest is reading over the error codes P0234, P0236, P0237 and P0238...

 

 

@Mopar1973Man  guessing by his screenname his truck is a 00, the map reads correct on a 00 truck using the equation I posted in that link.  

My truck is a 2000. 

55 minutes ago, Mopar1973Man said:

Remember the OBDLink will read a weird boost number. Like mine starts at 28.6 PSIa and goes to 37.7 PSIa. So it not going to help you figure out what's happening. Even my ScanGauge II does this very same problem.

 

Thing is you should never exceed 20 PSI period. Edge start boost fooling as low as 14 PSI. If the ECM is seeing above 20 PSI it will start to defuel as well. The P0234 code is typically tripped after about 23-25 PSI.

 

The only thing I could suggest is reading over the error codes P0234, P0236, P0237 and P0238...

 

 

Looks like all good reading but just curious why are you suggesting I read over the other codes other than p0237? Just fmi? I’ll defiantly look them over though! 

I have a pretty good feeling that the p1694 and p0123 are from when I forgot to turn off the ignition when I plugged the ecm back in. I cleared the codes and they did not come back which is why I assume that. 

5 hours ago, Me78569 said:

what you need to know is in this thread.  it has directions for adding map readings and the equation to the app.

 

 

I find this extremely confusing!  Is there a possibility you could type up all the values to be able to read the map? 

Please read the thread, I posted what you are looking for a few posts down.  

 

48 minutes ago, Marcus2000monster said:

ooks like all good reading but just curious why are you suggesting I read over the other codes other than p0237? Just fmi? I’ll defiantly look them over though! 

 

Because it gives all the wiring diagnostics and explains the limits of each type of error. In the same time you could verify your wiring and know if there is any wiring issues that might be there too.  Also might give you clues to isolating the issue at hand.

Edited November 9, 20177 yr by Mopar1973Man

11 minutes ago, Me78569 said:

Please read the thread, I posted what you are looking for a few posts down.  

 

Going thru my obd app I see a sae pid that says intake manifold air pressure. Is this not what I’m looking for? 

9 minutes ago, Mopar1973Man said:

 

Because it gives all the wiring diagnostics and explains the limits of each type of error. In the same time you could verify your wiring and know if there is any wiring issues that might be there too.  Also might give you clues to isolating the issue at hand.

Right on Mike! I’ll be lookin over al my wiring also. Really do appreciate the help guys. 

No our trucks intake manifold air pressure is not a standard PID.  you need to create it using the information in that thread.  

Ok I’ll give it a whirl after while! Thanks man! 

Nick would a scan gauge 2 do all the stuff we’ve talked about? Tempted to just see if someone local has one to make everything easier. Good idea? Bad idea?

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Posted May 31, 2016

Alright I have boost reading accurately for our trucks

 

 

Issue we have with our trucks is

 

early trucks read map values as 0-1023 or 0-5v 

late trucks read 0-255 and the ecm decodes that

 

our sensors read in KPA at least for early truck late trucks may read in PSI.

a KPA

 

Our sensors also do not take atmospheric pressure.  Our ECM takes the KPA from the map sensor then takes baro pressure and minuses it. 

 

 

So to configure on a early truck

 

Name: Boost

Description: Boost

Manuf: Generic

metric units: Units

english units: psi

min: 0

Max: 1023

Metric to english scale: .2

Metric to English offset: 0

header: 486

obd mode: 01

pid: 0B

Priority: high

equation: (A*.145)-16   ****16 is the approx of atmosphere so since I am high in altitude you take 14psi for sea level then add a few PSI for being high.  

 

So to configure on a late truck  ( untested but I think that should work)

 

Name: Boost

Description: Boost

Manuf: Generic

metric units: Units

english units: psi

min: 0

Max: 255

Metric to english scale: .2

Metric to English offset: 0

header: 486

obd mode: 01

pid: 0B

Priority: high

equation: (A*.145)-16   ****16 is the approx of atmosphere so since I am high in altitude you take 14psi for sea level then add a few PSI for being high.  

 

So using these numbers I statted the truck and ran this command and it came back with -2.71 psi. I don't have a splitter so I canr take it out and do that yet.

 

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How do I sens commands in the Obdlink app??

You have to build a custom PID for your gauge. So you would go under setting and build the custom PID for the OBDLink. Basically fill in the blanks with the information. 

Right on

Are you guys seeing a bunch of giant smileys in my post? 

No smiles here

11 hours ago, Marcus2000monster said:

Right on

Are you guys seeing a bunch of giant smileys in my post? 

Yes

that's a result of copy and pasting the entire post. 

Lol ok I was like how did those get there! Anyways I’m headed out of state for the weekend so I’ll get hold of an obd splitter and see what I find out. I’m working on the P0122 code troubleshooting and I think I may have a broken wire in the apps harness how would you go about digging it out?

Did you do the testing for the P0122 code? 

 

Funny part is if there was a broken wire I really doubt you'd be able to drive the truck at all.