74 1.8 - fuel pressure regulator?, opinions. |
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74 1.8 - fuel pressure regulator?, opinions. |
wonkipop |
Mar 14 2021, 01:01 AM
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#1
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Advanced Member Group: Members Posts: 4,624 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
car = 74 1.8 L jet (all intact).
problem = out driving this morning - gradual then worse loss of power. no accelerator response. pulled over. cut out. no idle. let it sit for a few minutes. restarted it. got it going. got up road all right, but symptoms kept coming back, then going away. limped it home. fun ruined for driving, but fun diagnosing started. felt like your classic fuel starvation. background. car has been recommissioned and back on road for about 5 months. running beautifully. fuel system entirely rebuilt. clean tank. new fuel lines. new fuel pump. new injectors. all vacuum lines renewed. all ignition compenents renewed. except coil (which could be original, looks like it, but coil was tested and was a goody). one thing = fuel smell in engine bay on lhs around air cleaner. comes after a few days sitting. had put this down to saturated charcoal cannister, feeding back fumes into aircleaner. have inspected all fuel lines etc thoroughly and no signs of any external fuel leaks/wetness. just a vapour smell thats not there all the time, just after sitting. pulled everything apart today down there after getting home today. checked everything. all tight, no air leaks. no bad hoses. looked at pressure regulator. which sits right there under aircleaner. i have no reason to think its not original and about 45+ years old. and did not get replaced. looks great externally, but.........internally? will get car into shop this week. where i can get some guages on it etc. at home with car. nothing but basic tools. but whats thoughts out there. anyone had this one before. |
StarBear |
Mar 14 2021, 11:55 AM
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#2
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Advanced Member Group: Members Posts: 2,054 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States |
Check your dual relay, under the battery tray. Unique to 1.8s, I believe. Took me a year to figure my cutting out/ restarting issue.
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wonkipop |
Mar 14 2021, 03:12 PM
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#3
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Advanced Member Group: Members Posts: 4,624 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
Check your dual relay, under the battery tray. Unique to 1.8s, I believe. Took me a year to figure my cutting out/ restarting issue. thanks for the tip. reading up on 1.8 injection control now - realising not like djet re fuel pump control etc. still things to learn every day with a 14. (IMG:style_emoticons/default/smile.gif) @bdstone914 only reason regulator on my list is the car sat for 16 years. all got replaced apart from it. diaphram might have failed because of bad treatement from me. @Mark Henry thought that. but am thinking pump. put the tank hoses in carefully with excess for relaxed looping. not easy to inspect from below on my car - its rhd! port is not there anymore. flex lines in and out of pump concern me - replacement fuel pump is in original location under engine but in line pump. hasn't emerged as a problem if it is until now. but its on my list. have to get the gauges on it - can't do much in the garage at moment. |
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