Fuel Injection
Posts about fuel injection systems and related topics.
748 topics in this forum
-
- 2 replies
- 1.5k views
I have a very slight leak, when I blow air into the brake booster bung, around the AFM boot, from the throttle body to AFM, it curls up on the ends from those dang Datsun 2 wire clamps. Since it is before the throttle plate should it affect the manifold vacuum? I could get wide hose clamps and stop it probably but if it doesn't matter what does it matter? It's the connection from AFM to throttle body accordion hose that won't seal. It's been a long morning, sorry.
Last reply by FastWoman, -
-
- 7 replies
- 2.2k views
I have a 1977 Datsun 280z that has been acting up. When I drive the car for a lengthy distance and shut it off, or if it reaches full operating temp, and try to come back 10-15 min later and start the car again the car will sputter and die. It usually takes multiple tries with the gas pedal slightly down to overcome the problem. I just replaced the fuel pressure regulator hoping to fix it but it was no help. Any ideas?
Last reply by FastWoman, -
- 11 replies
- 3.6k views
Amigos, The AFM on my '78 has been messed with, the previous owner had it leaned out considerably (and it still ran quite rich, probably richer now that I recalibrated it - decreasing the tension about 10 teeth) and upon inspection, it appears that the counterweight has been removed from the wiper. Luckily, I have found someone locally who said he has 5 AFMs, 3 working, 2 for cores, and I think I'm going to check them out this weekend but I have a few questions as the only ones I've ever seen the internals on are mine and the ones that Blue posted in his adjustment and calibration pages on the Atlantic Z site (many thanks, Blue, you saved my arse!). The first question …
Last reply by johnny haywire, -
- 35 replies
- 5.1k views
OK, a couple notes up front. My 76 is running pretty well. Starts great and seems to have decent power. I have a couple issues I would like to get a little direction on. I am new to the mechanic and restoration world but learning quickly. I have redone brakes completely (most if not all parts), upgraded to the 60 amp alternator and rewired for the internal voltage regulation, added horns and wired, added side marker lights that were missing, replaced internal door hardware, added new radio to name a few. All of these things I would not have been able to do without this forum / site. So thanks to all. Ok to the issues at hand. - I smell either a gas or exhaust sme…
Last reply by johnny haywire, -
- 4 replies
- 2.6k views
Hello all, This is my first post on this site. I am having some issues with my Z. How do I even begin to explain...! Main Question(regarding my Thread title): I may have to order a new AFM, after talking to MSA there are many... I have A31-625000 which is a 4 bolt (apparently more rare) and are almost never instock. Z CarSource asked me if it was 7 pin or 5 and I verified that it was 7 pin. But here is the funny part: 7Pin on the AFM and on the harness there are only 5 actual female connectors! What the heck! Inside the AFM is a working fuel cutoff switch. I ran though the AFM tests for the pins and everything seems to check out... I really dont want to mess aro…
Last reply by cronoz78, -
- 17 replies
- 5.1k views
I have a set of 6 brand new in the box and still wrapped in plastic Bosch 280Z fuel injectors. How much do you think they are worth? I want to list them but cannot find a reference point on pricing them. I will list them in the classified section once I come up with a price. They are listed on Craigslist San Diego, no bites.
Last reply by FastWoman, -
- 45 replies
- 8.7k views
Just a quick question for you FI gurus. I've got a few issues with the FI on my '78 280z (manual). She chugs a bit starting up when it's over 70 degrees F, then settles into a high idle, then comes down to what I believe is about 750 RPM, but this can take a while. She runs pretty well after being warmed up, no sputtering or front/back fires, but runs very rich. The exhaust is always very fumy and the fumes get into the car with the right type of breeze. But before I go about testing different FI bits, I was wondering, since my tach currently doesn't work, does the TPS (or ECU) count on a tach signal for its operation? I'm hoping that getting my tach working or replaced…
Last reply by johnny haywire, -
- 4 replies
- 2.3k views
75 280z manual Fuel Injectors Pulsating Too Fast and Flooding Engine Fuel pressure is 30-35 (appropriate) When fuel line is clamped off, engine will run til existing gas is depleted. However, when fuel is allowed to be injected at the rate the injectors are pulsating, it floods the engine. ECU?
Last reply by FastWoman, -
- 5 replies
- 1.5k views
I've been driving my newly acquired 75 280Z for a week now at just about 200 miles logged. When the car was shipped to me I got it with a full tank which I thought was both odd and nice of the PO. At half a tank I got some sputtering like it was out of fuel so I thought the PO didn't fill it up and instead had a bad gauge and I was on empty, so I filled up, the gauge correct, btw. Again at half a tank (and now lower) I'm getting the sputtering again AND a buzzing sound from the rear of the car. I changed the fuel filter and the fuel that came from the IN side was a nice brownish tint. After changing the filter the buzz was gone and I noticed an instant improvement in thro…
Last reply by rcb280z, -
- 1 reply
- 1.1k views
L-jetronic system trouble and maintainence article. http://www.hiperformancestore.com/Ljetronic.htm
Last reply by Wade Nelson, -
- 27 replies
- 30.2k views
My injectors are not firing, so I've done some tests... TL;DR: Has my ECU gone bad? Tested at the ECU harness, and each injector connection reads the proper voltage when grounded. Tested at the individual injector connectors, and read the proper voltage as well. Manually fired the injectors by grounding each corresponding terminal on the ECU connector. Turned ignition to "ON" and heard each injector click. Checked the ground circuits on the ECU harness, and all were fine. Basically, wiring from ECU to injectors tested OK, and wiring from ECU to ground tested OK. I've read that ECU failures are pretty unlikely, but all evidence seems to suggest that it may be at fault. Are…
Last reply by FastWoman, -
- 11 replies
- 5.9k views
I'm in the gathering stage for parts and info on changing my fuel injectors and connectors. I see the following info from the Atlantic Z club regarding depressuring the system http://atlanticz.ca/zclub/techtips/fuellinedepressure/index.html I have two questions with regards to this; does the polarity matter on the cold start valve? And do I need to take the cold start valve off the intake manifold or can I leave it in place and just expell the gas into the manifold? Of course this would kind of flood it and may be wash gas past the rings and into the crank. But I'd rather not have to scrape gasket off and reseal the cold start valve again if I don't have to. Any advice i…
Last reply by 240260280z,
-
Recently Browsing 0 members
- No registered users viewing this page.