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 !! |
ndfrigi |
Jan 3 2016, 03:18 AM
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#2
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Advanced Member Group: Members Posts: 2,953 Joined: 21-August 11 From: Orange County Member No.: 13,474 Region Association: Southern California |
I'm sure members here will ask this, FI or Carb? If FI maybe vacuum leak.
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Jon Dugan |
Jan 3 2016, 09:38 AM
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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 |
FI
It has run rich since I bought it. Run well too... I'll check the MPS and lube the felt next as suggested. Thx! |
Jason74914 |
Jan 9 2016, 09:35 AM
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#4
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Member Group: Members Posts: 76 Joined: 9-January 16 From: Dallas Member No.: 19,544 Region Association: None |
I have same issue with my 74. Will start and idle, but if you pull rpm's up, at about 2000 rpm it stalls back down to idle. (doesn't die). If I rev quickly it will go above 2000, but then fall back down.
I've checked everything. Checked pressure and seems good at idle, 40 psi. Someone else suggested a bad fuel pump, but seems odd since pressure is good. Fuel pressure regulator? I'm not sure how to test that. |
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