: code P 0171, P 0174 - solved

Harry Yarnell
04-19-14, 08:42 AM
Finally got around to solving the 171, 174 issues on my '97. After eliminating manifold issues, I looked at vacuum lines. Turns out the small plastic line that runs from the HVAC setup, along the RF frame, to the vacuum tank in the RF fender, leaked.
Not easy to remove so I just bypassed it with a length of rubber hose.

04-19-14, 10:01 AM
ANY of those plastic and rubber connector vacuum lines can be replaced with lengths of proper sized rubber line from the Help! racks at any large parts store.

Junk the plastic line AND rubber connectors and use a single piece of vacuum tubing. It comes in about 6 different IDs, so take the old rubber connector(s) with you.

Plenty of T, Y, and X - options, too

Harry Yarnell
04-19-14, 11:02 AM
Ah, the vacuum pump. Great tool for finding these leaks.