Fuel Injection
Posts about fuel injection systems and related topics.
748 topics in this forum
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OK, I have posted on this issue a few times and thought I would start one last thread. I have my 76 in the shop and trying to give the mechanic some suggestions based on your input. I hated to take it to him but I needed a little better look than I was capable of giving the car. Just about every other time I drive the car,which has not been very often (10 times in a year), it stops on me. I initially thought it was a gas delivery problem; however, after installing a pressure gauge, I believe it is more likely loosing spark. A couple days ago I went for a 30 mile drive and after about 28 miles the car shut down. The pressure gauge was reading 33-34 psi. It would not r…
Last reply by siteunseen, -
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- 7 replies
- 1.2k views
Anyone have an AFM they are willing to sell? I'm in need of one for my 77. I don't want to buy one of those expensive rebuilt ones. Haven't had good luck in the past with them. And besides I want to keep the one I have and rebuild myself some day. It is the original one with the anti back fire valve built into the flap.
Last reply by ZCurves, -
- 5 replies
- 1.3k views
Ok, here is the puzzle of the day. 1978 280Z, Daily driver In the last 2 weeks or so, I have gotten a starting issue. Car will fire up and then immediately die. This is not the 'very hot engine sitting with the hood closed vapor lock' issue. This can be at any time or temperature of the day(Texas). Things Checked:Coil,plugs, plug gap, spark from plug wires, fuel flow, fuel filter replaced, AFM 'fingered'. Car runs fine at all speeds and idle otherwise. My question is that this problem seems to be remedied by opening the gas cap after the start failure. If we open the cap, and crank, the engine can start. My thought is that a suction is created at the first start failure,…
Last reply by Captain Obvious, -
- 10 replies
- 2.5k views
Before everyone burns me up about using the search feature, I promise you that was the first thing I did. I used several posts to help me search through and check the connections at fuel pump, tank, expansion tank, filter, fuel rail and everything in between. All connections are tight, no hoses are ripped or failing, and there's no evidence of any gas leaking anywhere. So why is there such a crucial raw gas smell while driving? It only happens when the car is driving and typically at decelleration. Doesn't have to be after a hard accelleration, but take your foot off the gas and the cabin becomes full of fuel smell. I can't smell it at any other time. I can't get the car …
Last reply by txvepr, -
- 3 replies
- 1.7k views
The car has been running really well, but just recently I've been having a strange hesitation at WOT above 4K where it kinda feels like a rev limiter is cutting in. Turns out I was having a fuel starvation issue due to a pre-pump filter that was packed with crud. It was flowing enough to run at moderate throttle, but couldn't supply enough for peak demand. My tank isn't horrible, but clearly there's some rust in there - I swapped out the big one up front, and installed the pre-pump filter when I first got the car. I replace this little guy every couple of months (clearly not frequently enough!) I was also began having starting issues - both times the car was on a severe…
Last reply by siteunseen, -
- 8 replies
- 1.2k views
Saw this Cardone page from Rockauto and thought it was interesting. Resoldering and a test, and some identified common wear components replaced. Wonder what they are. Product Detail
Last reply by Captain Obvious, -
- 12 replies
- 3.1k views
OK has anyone else seen this? I bought a 77 280z that someone had already started a rebuild so I have no reference on how things 'used to be'. I'm starting reassembly and can't figure out how the cold start valve attaches to the fuel rail. This fuel rail is solid piping except where the regulator assembly mounts. I have two other z's to compare to and neither have this configuration. Ideas? I'm stuck.
Last reply by FastWoman, -
- 14 replies
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been driving for about 300 miles on the new head/cam and have been trying to hold my judgment until things wear in, but she's just not at 100%. what's been done: re-built head set valve lash at install, then hot adjust after an hour or so of run time set timing to 35 degrees max with no vacuum advance (seems to get best result so far) all new injectors - nos oem new CSV all new sensors at the thermostat housing checked/cleaned all bullet connectors from sensors checked/cleaned ground connections all new connectors at all injectors + cold start manifold cleaned out, new gaskets egr system removed, manifold sealed off 6-1 header k&n cold air…
Last reply by siteunseen, -
Hello All: My father and I have own several Z's over the years, but we've had this 77 280Z for quite a while now. I've collecting some parts to lately to do a "intake clean up" project. I found a non-egr intake manifold and purchased a PALNET fuel rail. New injectors, o-rings, fuel filter, fuel pressure regulator, pvc valve, fuel hose and vacuum hose. We just completed all of the work and at initial start up the car was running fine. Fuel Pressure was a little low but seemed to idle fine and rev smooth. We took the car for a fine and about 2 miles down the road things went way down hill. Any throttle caused the power to break up horribly. Car would idle ok (fuel pressure …
Last reply by FastWoman, -
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I have posted a few times in the past about this issue and have read some other posts but I have gotten myself a little confused on where to go first. I will do the best I can describing the problem/issue or opportunity. Remember I am not a mechanic but tyring to learn. I drove the car really for the first time in almost a year after dropping my gas tank, getting out rust, coating and reinstalling. The Fuel Filter was also replaced. Here we go........... Drove car about 50 miles, some at 30mph, some at 80 mph, and some in stop and go traffic. Car starts up fine, first try no issues. Idles at about 900-1000 rpms. Car ran ok for the majority of the trip. I feel it was…
Last reply by FastWoman, -
- 10 replies
- 2k views
I'm original owner of '76 280z and my mechanic found some rust in the bottom of gas tank (outside tank rust-free). He's going to restore the inside with POR15 fuel tank repair kit. Would you Z owners recommend a fuel stabilizer/preservative and if so, which brand is the best?? Z is in Minnesota and will be stored in the winter months. Plan to drive only when roads are snow/salt free at that time. Recommendations much appreciated. :stupid: Deb
Last reply by djwarner, -
- 2 replies
- 1.3k views
While working on the Z over the weekend I took a movie of my fuel pressure gauge for fun and enjoyment (and as a record of what its behavior is when the motor is running well). Though you all might be interested:
Last reply by FastWoman,
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