ZR-1 Net Registry Forums - TOP END REFINISHING

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ZR-1 Net Registry Forums (http://zr1.net/forum/index.php)

- C4 ZR-1 Technical Postings (http://zr1.net/forum/forumdisplay.php?f=9)

- - TOP END REFINISHING (http://zr1.net/forum/showthread.php?t=21439)

Schrade

10-12-2013 01:47 PM

TOP END REFINISHING

2nd ed.:

DEFINITELY read Cliff's - user <Dynomite> - links when he links them. They're not always directly to the pertinent information about what you're on at some point in repair - you'll have to read it ALL to get to the info, but it's ALL there, and you HAVE to go through it. (Thanks a ton for that stuff Cliff). Use your bookmarks tool in your browser for the info when you hit it, and note that sometimes you'll run across info that's IMPORTANT at a LATER point...

edit:
This is continued from the DataMaster thread, for 'hesitation' diagnosis
http://www.zr1.net/forum/showthread.php?t=21259

-------------------------------------------------------------------------
Next in the 'Hesitation' troubleshoot is spark plugs and wires check. Meaning access to the distributor to yank the wires.

This is about to become a Plenum Pull.

ed.:
This is now a plenum pull thread.
Link to the best procedure / tips / tricks?

Franke

10-12-2013 02:45 PM

Re: Throttle hesitation diagnostics?

I guess if you are going under there it might be wise to check all vac lines, check valves and mechanical/electrical connections too.

XfireZ51

10-12-2013 05:58 PM

Re: Throttle hesitation diagnostics?

Quote:

Originally Posted by Schrade (Post 185067)

Next in the 'Hesitation' troubleshoot is spark plugs and wires check. Meaning access to the distributor to yank the wires.

This is about to become a Plenum Pull.

ed.:
This is now a plenum pull thread.
Link to the best procedure / tips / tricks?

There is no distributor. You mean the DIS and ignition coil housing.
The biggest PITA for me are the 2 Ignition Module connectors up under the plenum. Other than that it's about a 15-20 min job IF you don't need to drain the coolant.

That TB looks like it hasn't been off for some time. Any obvious signs of torn gasket or vacuum leaks.

Schrade

10-12-2013 11:27 PM

Re: Throttle hesitation diagnostics?

11 bolts out - she's loose. Something holding it from underneath?

and all the surrounding plumbing unhooked and tagged...

???

Dynomite

10-12-2013 11:37 PM

Re: Throttle hesitation diagnostics?

Great Photos....thanks....:handshak:

Quote:

Originally Posted by Schrade (Post 185091)

It's been asked of me why the TB, and TB extension were pulled. Do they not have to come off to yank the plenum?

Anyway here, 2 hours cleaning (+ some extra narcotics for standing time UGH).

Screw threads cleaned with a toothbrush, bolt holes cleaned running the screws in and out with WD40, and flushed with more WD spray. Passages with pipe cleaner and paintbrush. Gasket faces with 1600 grit.

Spic and span sterile. Hate those stains tho' :neutral:

And I didn't disconnect the linkage cams (YET)...

https://lh3.googleusercontent.com/-d...0/IMG_5679.JPG

https://lh4.googleusercontent.com/-1...0/IMG_5680.JPG

Plenum to the car wash...

Jerry! My best buddy! happen to know anyone who sells gaskets??? :mrgreen:

Dynomite

10-12-2013 11:59 PM

Re: Throttle hesitation diagnostics?

Quote:

Originally Posted by Schrade (Post 185113)

Thanks there Cliff - glad I could help.

What's in front of MAP??? LOCTITE???

Looks like some harness connecors???

Not sure what you are asking :confused:

See Removing Plenum (including the 10 minute Plenum Removal)

15. Disconnect two small electrical connectors rear under Plenum (MAP and DIS).
16. Unscrew 1/4 bolt in Main DIS Connector rear of Plenum.

XfireZ51

10-13-2013 12:24 AM

Re: Throttle hesitation diagnostics?

That the cam sensor plug. Feel underneath, should be a tang to unlock it. Be careful tho not to break the tang. Pull down and push back plug at the same time. You also unbolted the DIS connector right?

Schrade

10-13-2013 12:33 AM

Re: Throttle hesitation diagnostics?

Drum roll...

:mrgreen:

Schrade

10-13-2013 12:39 AM

Re: Throttle hesitation diagnostics?

... and now this message from our sponsor.

Schrade

10-13-2013 12:53 AM

Re: Throttle hesitation diagnostics?

This is regular heat sink paste? For mounting CPU heatsinks???

http://www.zr1.net/forum/attachment....1&d=1381639984

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