Advice needed...car keeps vapor locking at Okteenerfest |
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Advice needed...car keeps vapor locking at Okteenerfest |
saigon71 |
Sep 23 2016, 02:11 PM
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#1
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Advanced Member Group: Members Posts: 2,000 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
1974 2056 D-Jet. Fuel pump mounted on firewall in engine bay. A few times over the summer, I experienced vapor lock and plan to move the pump the front of the car this winter. Fuel filter replaced last year and tank is squeaky clean.
Drove 454 miles to Okteenerfest. Stopped for lunch yesterday, it was hot. Fuel pump vapor locked. Waited it out, got back on the road and made it to Banner Elk. The drive today started off fine...probably went 70 miles or so with no problems before vapor lock set in. A guy at a golf course gave us a spray bottle of water. We sprayed down the pump, car started and we were on our way. After that, the pump locked up three more times in a span of about 20 miles (even after a two hour lunch break). Each time, the water spray cooled the pump down enough to get the car started again. Our luck was going to run out at some point having a place to pull off, so we cut the drive short and headed back to the hotel. Other than moving the pump to the front, what's the solution to get me through the weekend and get me home? I'm in a great place to be having this problem, but wanted to poll the world for additional advice. Thanks in advance! |
Bartlett 914 |
Feb 18 2017, 04:37 PM
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#2
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Advanced Member Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
I am all for moving the pump to the front.
I sometimes wonder if these issues are from a starved pump. If the tank is not getting air to displace the used fuel, the pump may run dry. The pump needs gas through it to keep it cool. Loosen the gas cap is a good way to see if this is an issue. |
mepstein |
Feb 18 2017, 06:32 PM
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#3
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914-6 GT in waiting Group: Members Posts: 19,315 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
I am all for moving the pump to the front. I sometimes wonder if these issues are from a starved pump. If the tank is not getting air to displace the used fuel, the pump may run dry. The pump needs gas through it to keep it cool. Loosen the gas cap is a good way to see if this is an issue. I don't think that is Bob's issue. He drove 7 hours to the event. I was in the car with him during the drive at the event. Not only was the day heating up but most of the times the car stalled, we were going slow and uphill. I think almost every time. The first time was pulling into town for lunch. We stalled it into the parking spot. At that point, we could let the car cool. The next time was a slow uphill through traffic, we were able to borrow a water spray bottle and that let us cool down the pump very quickly. The next time was another uphill and a couple hits from the water bottle got us going quickly. Previously, Bob used to have to wait 45 minutes to get going again. Once the engine was heat soaked, it didn't stay running long, especially when we slowed down. It doesn't seem to happen to him once the weather turns cool. I would be surprised if this doesn't fix the issue. The day we left, it was cool and I believe Bob drove home without issue. I think the airflow at 75mph also helped. If it doesn't, we'll just have to drop in a six. |
Bartlett 914 |
Feb 20 2017, 08:48 AM
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#4
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Advanced Member Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
I am all for moving the pump to the front. I sometimes wonder if these issues are from a starved pump. If the tank is not getting air to displace the used fuel, the pump may run dry. The pump needs gas through it to keep it cool. Loosen the gas cap is a good way to see if this is an issue. I don't think that is Bob's issue. He drove 7 hours to the event. I was in the car with him during the drive at the event. Not only was the day heating up but most of the times the car stalled, we were going slow and uphill. I think almost every time. The first time was pulling into town for lunch. We stalled it into the parking spot. At that point, we could let the car cool. The next time was a slow uphill through traffic, we were able to borrow a water spray bottle and that let us cool down the pump very quickly. The next time was another uphill and a couple hits from the water bottle got us going quickly. Previously, Bob used to have to wait 45 minutes to get going again. Once the engine was heat soaked, it didn't stay running long, especially when we slowed down. It doesn't seem to happen to him once the weather turns cool. I would be surprised if this doesn't fix the issue. The day we left, it was cool and I believe Bob drove home without issue. I think the airflow at 75mph also helped. If it doesn't, we'll just have to drop in a six. You may be right. I was only putting thoughts out there. The pump over heats. In a late car, the pump is behind a cover in an enclosed area and it does not over heat. This leaves me with 3 thoughts. Low fuel volume, defective pump or an external source of the heat. Maybe the flapper valve exhaust vent from the heat exchangers is doing this. |
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