Stupid 914 fuel filter question..
 

Hi all,

I've been involved with a customer's '76 914, (2.0, D-Jet) for a couple of years on and off.. Originally, I saw it at a stupidly shady body shop, and they were trying to get it running. The car sat for ten years, and due to neglect, and a terrible hack job at said body shop, it now needs absolutely everything. Among those things is a fuel filter, because they totally ripped out all of the fuel lines, and replumbed them with non-FI grade hose, and an unknown pump. The pump is super noisy, but seems to put out 30 PSI, so it stays for now. The filter is missing entirely, and I've found two possibilities.. One is a square plastic job that looks like a low PSI carb'd model, but has different sized inlet/outlet, suggesting it goes before the pump, and then the other option is a metal canister that looks like a modern Bosch FI unit.. Which should I have? Maybe both? one before, one after? Also, anybody have any really slick test rigs for fuel injectors? I've got a pretty good idea of what I want to mock up, but borrowing somebody else's better idea is always an option..

Thanks, Matt

Just an opinion and I might be wrong.....original filter was after the pump and had to be able to handle 2 bars of pressure. With many pumps relocated up front, it is possible to use a pre-pump filter, the caution is not to starve the pump if the filter chokes, heat and fire could result.
I have used a pre-pump filter with no issues, but I change it regularly. If the car sat 10 years, the tank is surely full of crud and the rubber lines have collapsed. be very careful. You can plug a filter very quickly.

As far as a test rig. My megasquirt has that functionality. car is not running now, but could be used to test injectors...

I used these guys years ago and the work was very good with quick turnaround.

http://www.witchhunter.com

I believe Ivan Arzola at IMA in Chantilly has Injector testers.
Dirk

Scott Zetterstrom at Sportscar Shop in Sterling added a nice injector test machine last winter.

Might find some other nuggets here about DJET in general: http://members.rennlist.com/pbanders/djetparts.htm

My '76 ran the "white box" fuel filter. I believe these were the OEM style. Two different size fuel lines.. maybe 8mm and 10mm iirc. Autoatlanta has them listed for $12 ( http://www.autoatlanta.com/ )

For fancy tunnel and engine compartment lines: http://www.tangerineracing.com/stainlessfuellines.htm

It's a 76. The pump is upfront.

Thanks all, I didn't realize that there were so many local companies who messed with these things. That being said, I'm going to build my own setup as the only things I'm willing to sublet to other shops are automatic transmission work, air/con, alignments, and body work. I don't have the tools or the capital to get said tools for those jobs. Yesterday, I just realized I've got an entire D-jet wiring harness and fuel rail/pressure regulator sitting unused in my '73 Volvo that I converted to SUs. I'm going to use that stuff and build one for myself.. I've got spare fuel pumps, a jump box and a sacrificial pressure gauge.. I think I'm good to go.

Back to the filter, is that square job rated for pressure? Or pre-pump? I'm guessing pre pump