Fuel Pressure

B-radster · May 19, 2014

First issue on first start up since build and its at 10 below right now but spout was not disconnected

madspeed · May 19, 2014

If it were me, here's what I would:

perform base idle reset
reset timing to 12 BTDC
run all codes
fix issues codes report
drink beer

B-radster · May 19, 2014

Ill drink to that!

madspeed · May 19, 2014

Summarized/Corrected Base Idle Reset version

1. Clean TB with carb cleaner and nylon brush (toothbrush size). Engine off, fully open TB blade and spray/brush TB until all gunk and oil residue is cleaned.

2. Allow to dry, or close TB blade and start engine until it clears all carb cleaner fumes/liquid.

3. Let engine idle...if it doesn't, increase idle speed via TB stop screw until engine stays idling on its own.

4. Disconnect IAC valve, if engine dies repeat 3 with IAC disconnected.

5. Set idle speed to the lowest setting possible between 600-800 rpms with IAC disconnected. It is key to use the lowest possible to prevent idle surge, rolling, etc once the IAC is connected as follows.

6. Turn engine off, and reconnect IAC

7. With Ign On Eng Off, check TPS voltage output....if it's between .7vdc - 1.0vdc, it's OK. This voltage check should be done between the Green and Black wires at the TPS side connector as shown in the pic below....(-) terminal of the DVOM on the Black wire and (+) terminal on the Green wire.

8. Disconnect battery (-) for 3-5 minutes.

9. Reconnect battery, start engine, allow it to idle for 2-4 minutes to confirm setup,

10. If idle speed falls too low or stalls, increase idle speed via the TB set screw a little at a time.

11. Turn engine off for 20 seconds, re-start engine and repeat 9 - 11 if required.

12. Reconfirm TPS output is within the .7vdc - 1.0vdc range.......you're done!...

..no need to reset ECM KAM (reset computer) b/c the TPS minimum value used for idle control, is automatically reset by the EEC-IV every time the ign is cycled on-off for 20 seconds-on, and as explained in the next post

13. Allow a 10-20 minute "relearning" period under normal driving conditions (drive cycle).....now you're done.

madspeed · May 19, 2014

forgot to post the idle reset procedures. Do that stuff when you can and report back your findings.

madspeed · May 19, 2014

then we'll all drink beer

madspeed · May 19, 2014

CHEERS!

Onefine88 · May 19, 2014

If its glowing the headers and you cannot find a vacuum leak, it sounds like timing is set waaay too low. If its not that ,its got to be a vacuum leak.
Be careful because glowing the headers at idle can fry the valves.

madspeed · May 19, 2014

yep, it apparently was set without pulling the spout connector, so its off. Time to redo.

Onefine88 · May 19, 2014

madspeed said:
yep, it apparently was set without pulling the spout connector, so its off. Time to redo.

yessir

mikestang63 · May 19, 2014

Onefine88 said:
If its glowing the headers and you cannot find a vacuum leak, it sounds like timing is set waaay too low. If its not that ,its got to be a vacuum leak.
Be careful because glowing the headers at idle can fry the valves.

Yep. Thats why I said check for vacuum leak. If he did the timing with the spout in, them his timing is no bueno.

B-radster · May 19, 2014

Thanks for the tips and help! Really appreciate it alot! I will update later on with how it goes. Thanks again!

madspeed · May 19, 2014

no prob

B-radster · May 19, 2014

This is all garbled up. 2 brown/green stripe spliced together bottom right of 4pin side to the left is a brown/red, to left is solid brown, last on left is gray/red stripe. No wires in top 2 slots.

B-radster · May 19, 2014

Theres no black/ white cpu test ground wire? Lol

B-radster · May 19, 2014

Cant dump codes but amazing what happens when you set timing correctly!!!

B-radster · May 19, 2014

B-radster said:
Cant dump codes but amazing what happens when you set timing correctly!!!

wont upload video?? Anyways any other tidbits like that "spout" i should know about that will affect the performance?

madspeed · May 19, 2014

the other port you need there is a single wire connector. Should be a few inches away coming from the same harness bundle. Find that.

madspeed · May 19, 2014

what year car?

B-radster · May 19, 2014

madspeed said:
what year car?

1990 mustang Gt. No single connector? A 2pin connector comes off wiper motor to no where. But no single? Will get into loom tomorrow to see if it got cut or corroded.

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