1990 Throttle hesistation

[Schrade]

Where do I buy a DIS 'checker'?

TPS is not new.

How do I examine the 'tables'?

[XfireZ51]

Originally Posted by Schrade

Where do I buy a DIS 'checker'?

TPS is not new.

How do I examine the 'tables'?

Are you datalogging any of this?

[Schrade]

Originally Posted by XfireZ51

Are you datalogging any of this?

I just replaced the OEM throttle stop screw, with another bolt, to be able to make FINE, MINUTE and PRECISE incremental increases in throttle, FOR DM recording, to attempt to see the 'offender' in action.

From post 79:

I need some way of MECHANICALLY increasing the throttle, in TINY increments, to get to 'the factor's threshhold'. The idle stop screw would be perfect, but it's too difficult to access, with all the components in place...

Today's exercise was just a dry-trial of the precision of the new bolt's movement.

NOW...perhaps we can find something in DM.

[Tyler Townsley]

Originally Posted by Schrade

Where do I buy a DIS 'checker'?

I use a OTC 3575 ignition system simulator also known as a PRI ISS Ignition System Simulator. I bought it off ebay years ago for $130. It checks Ford, Chev and Chry dis ignition systems. What I like about it is you do not have to have the car running to check it out, you do need a scope to look at the different signal forms which is how I saw the fact that the dis was falling apart.

Tyler

[Schrade]

Originally Posted by Tyler Townsley

I use a OTC 3575 ignition system simulator also known as a PRI ISS Ignition System Simulator. I bought it off ebay years ago for $130. It checks Ford, Chev and Chry dis ignition systems. What I like about it is you do not have to have the car running to check it out, you do need a scope to look at the different signal forms which is how I saw the fact that the dis was falling apart.

Tyler

Does it read out for ALL operational variables?

I have ONE, at least, which is not within spec. And without a DTC, I have to essentially see the whole operating system.

I think Windows is easier than this (and I do Linux OS). Command line interface doesn't scare me, but reading fuel trim cells - hmmm ...


I did the comma separated values data file, posts 37 - 39, this thread. Posted format didn't come out too well, and pertinent values might not appear, but I'm working on it.

Even BEFORE that, I need to know WHICH values to include in the 'Bit Data'. EGR duty cycle, and Vehicle Speed, for example, aren't necessary...

[Schrade]

This will be over NO time soon. It's a comedy of errorS, or a Greek Tragedy - depending on who's holding the wrench.

Got everything bolted back up, ready to manipulate the throttle stop bolt for DM recording, and lo and behold, the coolant by-pass line had jumped the casting ridge on the A/C compressor again - bound under the primary butterfly shaft.

I was cursing.

Got it un-zipped, freed up the line in 3 minutes, back together. Then the last TB extension bolt fell out.

It is no where to be found.

Then I REALLY started cursing.

And the D side coolant manifold elbow is leaking - can't tell if it's a loose gasket, or ruptured elbow.

Next up; drain the coolant from the cross-over pipe lower, pull it, and pull the serpentine belt, to get a better field of view. Hopefully, the bolt will show without having to break down block front accessories...

This is getting really discouraging.

[Tyler Townsley]

Originally Posted by Schrade

Does it read out for ALL operational parameters?

I have ONE, at least, which is not within spec. And without a DTC, I have to essentially see the whole operating system.

I think Windows is easier than this (and I do Linux OS). Command line interface doesn't scare me, but reading fuel trim cells - hmmm ...


I did the comma separated values data file, posts 37 - 39, this thread. Posted format didn't come out too well, and pertinent values might not appear, but I'm working on it.

Even BEFORE that, I need to know WHICH values to include in the 'Bit Data'. EGR duty cycle, and Vehicle Speed, for example, aren't necessary...

The checker does not 'read' any sensors. It simulates the inputs to the dis module. It has an adjustment that varies the inputs from 0 throttle to 7k. You can scope the output to the coils or pull the plugs and watch the spark across the plugs.

http://thepandatrap.com/tyler/misc1/dis_3.jpg
http://thepandatrap.com/tyler/prototype1/page18.jpg
http://thepandatrap.com/tyler/prototype1/page16.jpg

Tyler

[Tyler Townsley]

Originally Posted by XfireZ51

Chuck,

transitioning from single to double injector spraying since the ECM is transitioning from a Closed Port VE table to an Open Port Throttle VE table. .

I did not think we were talking about going into the PE mode here. I assumed we were talking about normal throttle operation?

Tyler

[XfireZ51]

Originally Posted by Tyler Townsley

I did not think we were talking about going into the PE mode here. I assumed we were talking about normal throttle operation?

Tyler

Tyler,

No, you're correct. Chuck has eliminated his secondaries and installed a Haibeck chip that brings on the secondary injectors above idle.

[Tyler Townsley]

Originally Posted by XfireZ51

Tyler,

No, you're correct. Chuck has eliminated his secondaries and installed a Haibeck chip that brings on the secondary injectors above idle.

OK I have the same mod but I thought when Tod (I assume Marc is using Tods hack to accomplish the turn on) did the mod it turned on both injectors on start.

Tod are you out there?

If he is turning on both injectors is he using the constant that controls the initial flow of the injector then calculating how much to cut from one injector and applying that to the second injector on turn on so that the flow rate is the same? That % calculation is a constant in the table and can be adjusted.


Tyler