74 2.0 Idle/Stall remedy suggestions appreciated, Ran fine one day, not so fine the next |
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74 2.0 Idle/Stall remedy suggestions appreciated, Ran fine one day, not so fine the next |
Jon Dugan |
Jan 3 2016, 02:17 AM
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#1
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Newbie Group: Members Posts: 13 Joined: 3-January 16 From: Bay Area Member No.: 19,521 Region Association: Northern California |
Hello fellow 914ers,
First post here... My 74 2.0 was my daily driver for the past 5 years until it decided not to be... Ran fine one night, parked it, next morning no so much. Starts right up no problem but rev above say 2000 RPM, it wants to bog out and stall. I do get an occasional smooth rev through to red line though. Tried advance/retard adj with the dist and can now only find idle around 1600 RPM (normal idle was about 600 RPM I think) but then lose it whwn I try to dial it back down. Dist checks out fine ($65 test by Porsche mech in Campbell). The guys at PH suggest maybe the fuel pressure sensor (grenade) has failed. I have limited troubleshooting skills and budget and was hoping to get back into AX this year after a long hiatus so any suggestions will be much appreciated. Thanks in advance !! |
TheCabinetmaker |
Mar 19 2016, 01:39 PM
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#2
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
No dwell adjustment in 5 years? I'm gonna assume that valves haven't been adjusted either. I'd do both. You can set the timing all day but if dwell is off it doesn't do any good. Valves first, then dwell, then timing. I'm betting your points are closed. Pop the diz cap, put the car in 5th gear, roll car forward till points rub block set on one of the 4 high points on the diz shaft, then set it to .017 (17 thousandths) clearance. Then check dwell and reset the points as many times as it takes to get the dwell to 47 degrees + or - 3 degrees.
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Jon Dugan |
Mar 19 2016, 02:22 PM
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#3
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Newbie Group: Members Posts: 13 Joined: 3-January 16 From: Bay Area Member No.: 19,521 Region Association: Northern California |
No dwell adjustment in 5 years? I'm gonna assume that valves haven't been adjusted either. I'd do both. You can set the timing all day but if dwell is off it doesn't do any good. Valves first, then dwell, then timing. I'm betting your points are closed. Pop the diz cap, put the car in 5th gear, roll car forward till points rub block set on one of the 4 high points on the diz shaft, then set it to .017 (17 thousandths) clearance. Then check dwell and reset the points as many times as it takes to get the dwell to 47 degrees + or - 3 degrees. Thanks for the response!! I did have a valve adjustment/tune-up about 4 years ago so I'm no doubt overdue. I also went will optical in the diz.. I've been hoping to get it running well enough with a possible "obvious" fix per the symptoms, to drive it, rather than tow it, the 40 miles to the mechanic that did the work last time.... Good Times !! |
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