 Is it needed for FI guys to let the fuel pump prime before start |
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| carcus |
 Sep 20 2017, 10:47 PM
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Member  Group: Members Posts: 223 Joined: 16-March 16 From: Colorado Springs Member No.: 19,760 Region Association: Rocky Mountains  |
Just wondering. I have Bosch FI at Colorado altitude. My car will not start up right away unless I turn the key and wait about 10 seconds for the fuel pump to prime. All plugs and wires new, new fuel pump, and fuel filter. Moroso electronic conversion. New battery. I try to drive the car once a week. Just looking for advice. Car is a 1976 2.0 with 1973 2.0 engine. OEM fuel injection.
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| andreic |
Sep 21 2017, 02:06 PM
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Member Group: Members Posts: 172 Joined: 21-December 15 From: Madison, WI Member No.: 19,479 Region Association: Upper MidWest |
I have an L-Jet on my car and it behaves as you just described, just that after not starting the car for a day or two (or more) I need to first crank the car for a few seconds, let it sit 10 seconds, then crank again when it starts right up. I also suspected pressure bleeding back into the tank, but never tested it with a gauge on the rail or diagnosed where the bleeding happens. It's on my list of things to do. (I posted a very similar question a couple of weeks ago on this forum.)
My pump is a brand new Bosch, so I guess I'll start with the pressure regulator valve at the other end. For a while I also worried that maybe one of my injectors has a slow leak (which would also bleed pressure). Not sure how to check for that (or for the regulator valve for that matter). |
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Posts in this topic
carcus Is it needed for FI guys to let the fuel pump prime before start Sep 20 2017, 10:47 PM
Mikey914 Pretty normal if not driven daily.
At least in my ... Sep 20 2017, 10:52 PM Mblizzard Best way to tell is to add a fuel pressure gauge a... Sep 21 2017, 07:09 AM McMark If you listen carefully, a lot of new cars will ru... Sep 21 2017, 07:31 AM
BeatNavy
But if your system is bleeding off pressure over ... Sep 21 2017, 08:00 AM AndyB On the 1.8 liter the pump doesn't start pumpin... Sep 21 2017, 07:40 AM McMark http://www.914world.com/bbs2/uploads/post-12889-14... Sep 21 2017, 08:46 AM 76-914 I have 76 2.0 that I start every week or two. Turn... Sep 21 2017, 10:09 AM DM_2000
I have 76 2.0 that I start every week or two. Tur... Oct 20 2017, 06:28 PM Dave_Darling I don't think that valve in the photo is a che... Sep 21 2017, 11:11 AM brant yes and no
I have taken a few 3 port pumps apart
... Sep 21 2017, 02:52 PM BeatNavy
that lasted about 3 months and then the used rubb... Oct 19 2017, 05:53 PM Rand Ten seconds makes no sense. If a pump took that lo... Sep 21 2017, 03:24 PM JamesM
Just wondering. I have Bosch FI at Colorado altit... Sep 21 2017, 10:40 PM falcor75 Get a pressure gauge and install it on the rail be... Sep 21 2017, 10:50 PM |
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