 Problem solved! Emergencyish Situation! Need a good MPS, MPS failure right before shipping car. |
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| hcdmueller |
 Feb 20 2021, 06:55 PM
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?????????????  Group: Members Posts: 542 Joined: 4-February 06 From: UK Member No.: 5,527 Region Association: England 
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I am in the middle of moving to the UK. The Air Force has already picked up all of our stuff. 2 days ago I tried to start my car and no luck. It's a 76 and after relacing or troubleshooting everything, it's still not starting. I bit the bullet and bought a vacuum pump from Harbor Freight to check out the MPS. It isn't a complete fail, but it leaks down from 20 to 14 lbs in < 4 min.
List if things I've done. New vacuum lines, rubber intake sleeves, injector seals, fuel filter, spark plugs, head temp sensor. Checked fuel pressure, injector function, TPS adjustment. I have the 123ignition distributor with new cap and rotor. I have to ship this car in 10 days or less. Obviously it needs to be running. Does anyone have a known good 2.0 compatible MPS I could borrow/rent/purchase right now? I'm in Panama City, FL. Given the weather, something closer to me would probably be better. Other options could be a good running set of carbs and intakes or if someone has a plug n play microsquirt setup sitting on the shelf. Any help is appreciated. |
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| anderssj |
Feb 21 2021, 05:32 PM
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Dog is my copilot... Group: Members Posts: 1,663 Joined: 28-January 03 From: VA Member No.: 207 Region Association: MidAtlantic Region
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This may be a stretch, but is the fuel pump cycling on when you first turn the key?
Not sure about 1976 cars, but on earlier cars the fuel pump and the heater fan share a 25A fuse on the relay plate in the engine compartment. Fuse can go bad/lose connectivity due to corrosion. Check if the heater fan comes on; if no heater fan, likely no "+" to fuel pump. (Had this happen on second day of PCS trip from Langley to McChord back in the day.) Please see Clay's post of relay plate diagram at bottom of this thread: http://www.914world.com/bbs2/index.php?showtopic=351670 Hope this helps! |
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| r_towle |
Feb 21 2021, 06:20 PM
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#3
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Custom Member Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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QUOTE(anderssj @ Feb 21 2021, 06:32 PM)  This may be a stretch, but is the fuel pump cycling on when you first turn the key? Not sure about 1976 cars, but on earlier cars the fuel pump and the heater fan share a 25A fuse on the relay plate in the engine compartment. Fuse can go bad/lose connectivity due to corrosion. Check if the heater fan comes on; if no heater fan, likely no "+" to fuel pump. (Had this happen on second day of PCS trip from Langley to McChord back in the day.) Please see Clay's post of relay plate diagram at bottom of this thread: http://www.914world.com/bbs2/index.php?showtopic=351670 Hope this helps! ^^^^ Plus Ground strap in distributor advance plates Make sure the advance plates are clean and easily open and close...or expand and contract Points, remove, clean with Emory paper or sand paper, re-install Check spark, fuel, air You need all three |
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Posts in this topic
hcdmueller Problem solved! Emergencyish Situation! Need a good MPS Feb 20 2021, 06:55 PM
Bleyseng Thats not much of a leak down 20hg to 14 hg in 4 m... Feb 20 2021, 08:45 PM rjames I would think your MPS holds enough vacuum for the... Feb 20 2021, 09:22 PM hcdmueller I agree that the MPS should be good enough, but I... Feb 20 2021, 10:17 PM hcdmueller It probably sounds like I just ripped every part o... Feb 20 2021, 10:32 PM iankarr I’d guess something distributor related if every... Feb 20 2021, 11:47 PM 914LIVE =================================
How about HEAD ... Feb 21 2021, 12:52 AM JeffBowlsby What does ‘some’ fuel mean? Verify the correc... Feb 21 2021, 09:46 AM Bleyseng A blown MPS usually means pig rich trying to start... Feb 21 2021, 10:34 AM sportlicherFahrer Have you tested all the contacts at the ECU connec... Feb 21 2021, 04:52 PM
burton73 When I bought my 76 car from a guy in Texas 10 ye... Feb 21 2021, 06:07 PM hcdmueller So, the problem has been solved.
After checking ... Feb 21 2021, 09:10 PM
rjames Awesome. Glad you got it figured out! Feb 22 2021, 03:32 PM |
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