Fuel Injection
Posts about fuel injection systems and related topics.
751 topics in this forum
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- 1 follower
- 13 replies
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I've been looking to replace the fuel hose(s) in the EFI Unit on my 76 Z. It still has the original braided hose and I wanted to retain the factory look. I located some on a classic Porsche site, that says it can be used for MFI. Thoughts?
Last reply by MattSaint, -
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- 27 replies
- 6.1k views
think this will work? http://www.ebay.com/itm/2-to-3-45-Degree-Reducer-Silicone-Coupler-Black-Red-/130520963545?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e63a7d9d9&vxp=mtr&rmvSB=true there are other sizes as well need to confirm the IDs on the AFM and TB.
Last reply by siteunseen, -
New Fuel Tank 1 2 3
by bhermes- 31 replies
- 5.4k views
Ok, after 3 years chasing my stalling issue, I am back to my initial assumption. I has always suspected the rust and condition of my fuel tank was the issue. I attempted to clean and coat the tank myself but the tank is in bad shape. I am going to have someone look at the tank one last time but then looking for a replacement. If anyone has one please let me know. Has anyone had an issue with hydro-locking? Or maybe just rust clogging fuel pump. Also it appears that one of my injectors is bad. Is there anything I should know when getting a new one. Thanks.
Last reply by ramsesosirus, -
- 16 replies
- 7.6k views
1976 280z, stock system. Had some bogging at around 3000 rpm, adjusted the TVS. Checked plugs (which are new, only been run when test firing engine). I assume the best option will be to "GET A NEW INJECTOR", but I'm trying to avoid that right now... (I know I might have to eventually....) All the plugs looked the same except one, Cylinder #5 was brand new looking. Could be no spark, no fuel, or possibly being "steam cleaned" from a water (head gasket) leak. Checked spark, swapped plugs, wires, etc... SPARK IS GOOD TO ALL CYLINDERS. Tested in multiple ways. Did the screwdriver test. Verified all the other injectors have good "tapping" noise,…
Last reply by siteunseen, -
- 7 replies
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Maybe this has been covered a bunch but here is my attempt and installing the filter. 1st the reason why, my tank was renewed and a the time the prefilter sock was NOT replaced, so I have a open tube for the pickup. So the G-3 fram filter was picked to go between the tank and the pump inlet. 1st problem was fuel hose sizing, I think I had used either 1/2 or 7/16" fuel hose originally for the tank to the pump. the 7/16 seemed way to big to fit on the 3/8 filter inlet. I did not trust the hose clamp to make up the difference, perhaps it would but I wanted to try something different. So I am in the process of heat molding some 3/8 line over a 1/2" mandrel by h…
Last reply by Dave WM, -
- 1 follower
- 2 replies
- 1.8k views
Hi Z enthusiasts. I have a '78 280Z with 64k miles and is in stock condition. I have never had the problem I am having right now with it in the three or so years I've had it. It has just started to run somewhat rough, almost like it is not running on all cylinders, maybe down one. It holds an idle but is not as smooth as it used to be. When driving, it feels down on power throughout the rev range and no matter how much throttle is applied. At idle, it will gradually accelerate overall fine but still with somewhat of a stumble, and as mentioned down on power when driving. When more abrupt throttle is applied, the engine stalls for a second or so before it revs up. …
Last reply by Zed Head, -
1976 280Z. Car was given to us. Engine just rebuilt and put back in. Getting spark. Fuel pump replaced with known good unit (parts car that ran). Dropping resistors measure 6 ohms per troubleshooting guide. Relays replaced #2 injector does not measure 12V at ECU (all others do) brand new fuel filter i have pressure at the rail (loosen hose clamp and fuel sprays out). spark plugs are not wet when removed. i suspect that the injectors are not opening timing could be off as I did the rebuild myself brand new battery. car turns over, does not start. any ideas?
Last reply by Zed Head, -
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- 8 replies
- 1.6k views
just posted this: i have a threads on here that chronicle the complete overhaul of the efi system on my 78 280, then i built a new motor and went w/su's so i have the whole system for sale - complete, soup-to-nuts, ready to bolt on and go.
Last reply by rossiz, -
- 61 replies
- 9.5k views
The original Bosch fuel pump check valve is NLA and I've been messing around with alternatives. The original check valve has a 10mm x 1.0 threaded inlet and a barbed outlet to accept an 8mm hose. Can't get it anymore... There are other Bosch check valves available with a 10mm x 1.0 threaded inlet, but the outlet styles are different. Not a problem! Here's the first alternative I've worked through. This one uses a 14mm thread taper seat style outlet. Bosch part number 1 587 010 539 Here's a pic of the stock check valve on top and the 539 on the bottom. Note that the pump end threaded portion of the alternate is longer than the original valve. It is so long, in fact, tha…
Last reply by hansonsaid, -
- 3 replies
- 2.3k views
Can anyone tell me what the size is for the drain plug on a '76 280z? The service manual doesn't give it. I found this size at hybridz (M16.4 - 1.33) but I'm not sure I trust it.
Last reply by ksechler, -
- 1 follower
- 11 replies
- 2k views
A friend of mine just finished restoring the body on a 280Z and when he was done, it wouldn't start. It appears the EFI harness has been hacked into and patched and we're thinking that if someone makes a replacement harness like they do in the Porsche world, it might be a best fix... Leads?
Last reply by the_tool_man, -
- 29 replies
- 11.3k views
my 78 280 reads very low vacuum (9-10 at idle) when tested at a manifold nipple at the back near the brake booster, but it picks way up to the middle of the green zone on my gauge when i rev the engine above 2K. i get almost zero vacuum at the ported nipples on the bottom of the throttle body. while the car seems to run well it bugs me... also i notice a slight idle fluctuation - from 700-900 in a constant, sweeping pattern. i have done quite a bit of work to this car: new head, good compression, i've re-built the entire manifold, replaced all lines, new injectors, new fuel filters, (new afm & ecu by PO) new pcv - the works. i've checked the fsm a dozen times and…
Last reply by TomoHawk,
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