what code reader?

U ONT 2

U ONT 2

New member
hey. Ive been looking around and just cant find what Im needing. Somebody please .......

I just replaced the headgaskets and now trying to figure out where everything went or lays. I have a scanmaster on my TypeT. What tool is everyone using to tune this brick? I can't find values for ;
tps :
iac :
fuel pressure :

Can I go to Advanced or Oreilly's to get a reader?

Also, getting ready to zero lash my rockers. Do I need to put all 13 quarts of coolant in? then purge to put valve cover back on?

I have 10 days to get this running and ship/sell her.
 
sytyguy

sytyguy

Moderated User
Re: what code reader?

You've come on here and done nothing but ask questions and show impatience. It's remarkable that you expect an immediate answer. We all have lives too.....and when we ask questions, we often have to wait for the answer or figure it out ourselves. It's not like this a board dedicated to helping you get your truck running. Having said that, I'll help in hopes that you'll alter your future perception of the group and give as much as you take.

For fuel pressure, you need a gauge to read the pressure at the schrader valve (on the driver-side of the fuel rail, just up from the MAP sensor). In the past AutoZone would rent out a fuel pressure tester (gauge with one pressure hose and one relief hose) for free. With that hooked up, the truck idling, and the vacuum line disconnected from the fuel pressure regulator (plug the vac line to prevent a vac leak while testing), you want fuel pressure to be in the 42-43 psi range. If the truck has an adjustable regulator, you may need to back the pressure down if it's been elevated. Remember to reconnect the vac line to the FPR when done.

For data reading, you will need a scantool.....again, AutoZone has one that you can "borrow" to read sensor values. For the TPS, you want the sensor to be in the .5v range at idle and rise in a linear fashion (relative to the pedal) all the way up to 4.0-4.5v at WOT (obviously, test this with the key on / engine off). IAC is a little less specific in what to look for (value-wise). You want a warm idle to be well below 40, ideally in the 10-20 count range. The counts are representative of how "hard" the ECM is working to maintain a high quality idle. If the counts are jumping around a lot or stay high, you could need a new IAC or at least a cleaning. Additionally, you could have a vacuum leak if the IAC readings are inconsistent or odd. A quick test is to spray starting fluid around the vacuum lines and intake gaskets at idle. if you hear the engine "rev" you have found a leak.
 
U ONT 2

U ONT 2

New member
Re: what code reader?

THANK YOU. Im glad that you've responded.

I hope that my impatience could lead for a permanant sticky in the tune section. Even if it is just a refresher for those of you that this is second nature. Like alot of other forums, most of the threads lead off to personal talk. It is very hard to get straight forward information. I put my trust in trying to figure out a problem. If I am unsure, I am always quick to ask a question. My fear of not having this truck running is apparent.

Again,
THANK YOU.
 
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