0000124: Engine stumbles after start-up

(0000124)
legoguy (administrator)
2014-07-18 02:52

Pending sensor replacement

(0000127)
legoguy (administrator)
2014-09-14 19:34

Blue Coolant Sensor replaced, no change.
O2 sensor was replaced as well. No noticeable change, though fuel economy improved.
Fuel pressure regulator also faulty and replaced. Improved situation after periods of sitting (as it now holds fuel pressure properly).
Vacuum hoses replaced. No change (none was expected).
Vacuum elbow connecting to intake pre-heat valve was old and deteriorating. Replaced. No change.
Further investigated all aspects of intake pre-heat system. Found that thermostatic valve was installed upside-down. Removed from airbox top, then found that the thermostatic valve gasket was old and not sealing. Replaced gasket with another used piece, and reinstalled valve in correct orientation. Confirmed visually that the intake pre-heat system is now functional.

This resolved this issue. Cold starts are no longer an issue.

(0000141)
legoguy (administrator)
2015-08-10 20:11

This is happening again, time to check all parameters to see what's going on.

(0000148)
legoguy (administrator)
2015-08-20 05:18

Replaced idle screw o-ring, rechecked all grounds and cleaned several of them. Resolved

Issue History
Date Modified	Username	Field	Change
2014-07-18 02:25	legoguy	New Issue
2014-07-18 02:25	legoguy	Status	new => assigned
2014-07-18 02:25	legoguy	Assigned To	=> legoguy
2014-07-18 02:52	legoguy	Note Added: 0000124
2014-07-18 02:52	legoguy	Status	assigned => confirmed
2014-09-14 19:34	legoguy	Note Added: 0000127
2014-09-14 19:34	legoguy	Final Cost	=> 200
2014-09-14 19:34	legoguy	Mileage @ Resolution	=> 177700
2014-09-14 19:34	legoguy	Status	confirmed => resolved
2014-09-14 19:34	legoguy	Resolution	open => fixed
2014-09-14 19:37	legoguy	Fixed in Version	=> 2014-09
2015-08-10 20:11	legoguy	Note Added: 0000141
2015-08-10 20:11	legoguy	Status	resolved => feedback
2015-08-10 20:11	legoguy	Resolution	fixed => reopened
2015-08-10 20:11	legoguy	Status	feedback => confirmed
2015-08-10 20:12	legoguy	Fixed in Version	2014-09 =>
2015-08-10 20:12	legoguy	Target Version	2014-08 => 2015-08
2015-08-20 05:18	legoguy	Note Added: 0000148
2015-08-20 05:19	legoguy	Status	confirmed => resolved
2015-08-20 05:19	legoguy	Fixed in Version	=> 2015-08
2015-08-20 05:19	legoguy	Resolution	reopened => fixed

Notes
(0000124) legoguy (administrator) 2014-07-18 02:52	Pending sensor replacement

(0000127) legoguy (administrator) 2014-09-14 19:34	Blue Coolant Sensor replaced, no change. O2 sensor was replaced as well. No noticeable change, though fuel economy improved. Fuel pressure regulator also faulty and replaced. Improved situation after periods of sitting (as it now holds fuel pressure properly). Vacuum hoses replaced. No change (none was expected). Vacuum elbow connecting to intake pre-heat valve was old and deteriorating. Replaced. No change. Further investigated all aspects of intake pre-heat system. Found that thermostatic valve was installed upside-down. Removed from airbox top, then found that the thermostatic valve gasket was old and not sealing. Replaced gasket with another used piece, and reinstalled valve in correct orientation. Confirmed visually that the intake pre-heat system is now functional. This resolved this issue. Cold starts are no longer an issue.

(0000141) legoguy (administrator) 2015-08-10 20:11	This is happening again, time to check all parameters to see what's going on.

(0000148) legoguy (administrator) 2015-08-20 05:18	Replaced idle screw o-ring, rechecked all grounds and cleaned several of them. Resolved

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