Fuel Injection
Posts about fuel injection systems and related topics.
751 topics in this forum
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Just a couple of suggestions on Fuel Injector cleaners that REALLY work. I've personally used these products on my 1998 Audi and 1976 280Z and can attest to their effectiveness. 1: Liqui Moly Jectron fuel injection cleaner. Liqui Moly is a German company that makes top quality Lubricants and other Automotive chemicals. Jectron works really well at cleaning injectors. Sometimes it takes 2 or 3 treatments, but it really cleans out gummed up injectors. Good as a regular maintenance product. 2: CRC 1-Tank Power Renew: CRC products are always good quality. I've tried this product and it really cleaned out my high mileage 280Z injectors. It's a bit pricey, so I use…
Last reply by TomoHawk, -
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- 1 follower
- 21 replies
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Hello all! I have been slowly getting my '77 280Z 2+2 5 speed manual up and running. It seems to be going well for the most part. However, the last two tanks have been giving me some pretty poor MPG! When I first got the car running, I filled the tank, set the tripometer to zeros, and drove until I used what I thought to be about a quarter tank of gas. I refilled, did the math, and I was getting about 15 MPG. This was with a combination of in city and highway driving. I would have liked it to have been better, but could have lived with it if I had to. However, over the last two tanks of gas, when calculating MPG I am getting between 11 and 12 MPG! Again, this …
Last reply by gundee, -
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The Zfuel thread was getting kinda long, so I thought I would start a fresh one along with the new update. The original thread is here: http://www.classiczcars.com/forums/fuel-injection-s30/49964-zfuel.html Well, today the HellFire ECU ran my Z quite nicely using 100% stock components (including cold start valve) & of course the stock AFM. It started and was very rich, which I did expect as I just had guesses in for AFM calibration. I tweaked the numbers and brought the pulsewidth down and the engine smoothed right up and purred around 800-900. I was able to track the CLT and IAT temps come up on the GUI and could tell I was having to lean up the fuel as it warmed up…
Last reply by FastWoman, -
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- 11 replies
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All this talk about Vacuum Tube ECU's etc got me searching E-Bay. Looky what I just found... and bought. $500 USD complete:
Last reply by Chickenman, -
I'm just thinking out loud: I had a notion for how to build an interesting linear circuit, with a possible application towards replacing our crumbling ECUs. We'd have off-the-shelf parts and open-source design! I don't know whether I'd want to get into a project like this, but I'm thinking about it. Sure, it wouldn't have the coolness and sophistication of a digital design, but then again, isn't there a certain coolness about maintaining analog control? My thought is this: It should be possible to take two voltages and generate an output pulse whose width is a scaled product of those two voltages. This schema would use a typical voltage ramp (timing capacitor) wit…
Last reply by Captain Obvious, -
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Just an FYI for those who want to Insulate their Fuel Injectors and Fuel Rails from heat. Wire Care makes a variety of Thermal Tubing, Firesleeves and Thermal wraps. A really handy product is the T6 Thermal wrap. This comes in various diameters ( from 1/4" to 2" nominal ) and is split so that it can easily be wrapped around lines and injectors. Has a self sealing Hi Temp adhesive on sealing edge to provide a clean and durable installation. https://www.wirecare.com/products.asp?prodline=t6f Wire Care has some other really interesting products.
Last reply by Chickenman, -
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- 10 replies
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I have a chance to buy a 75 EFI "matching" system complete for my 77. The only reason I'm considering using the 75 is because my 77 EFI has been butchered by previous owners and I have searched a long time for a complete 77 and have come up with "0". This 75 system looks to be in really good shape. Harness doesn't look butchered, AFM cover is still siliconed on, can tell it hasn't been removed, etc. Correct me if I'm wrong but as long as its a complete 75 system it should fit my 77 right? As long as I use all the 75's system I should be good. I'm pretty sure this is correct but verification would be nice. Thanks in advance.
Last reply by FastWoman, -
- 7 replies
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I have a Federal Dizzy with dual pickups on my 1976 280Z. On cold start-up the advanced pickup is actuated and specs call for an additional 6 degrees of advance over fully warm specs. I have a fairly big cam in the car and wonder if any one has experimented with increasing the " Phase " split on cars with big cams? The car is pretty snarky when cold even with the static advance bumped to 12 degrees BTDC. First thing to do is to actually check if the advanced pick up really is set to +6 degrees additional advance. I know someone has messed with the dizzy before. If that checks out I'm going to bump the " advanced " ( cold running ) pickup to +10 degrees of advance and …
Last reply by Chickenman, -
- 2 followers
- 139 replies
- 21.2k views
Many people have reported having the typical 280Z EFI hot-start problem, where after ~10-20 minutes after shut-down (hot engine), the engine starts but runs very rough for what seems like 5 minutes but is actually about 30-40 seconds. Some people with EFI though, report that they don't have the problem (see #43 here - http://www.classiczcars.com/forums/fuel-injection-s30/51601-hellfire-status-release-date-annouced.html#post452357). If we collect enough information, maybe a common solution (or non-cause) will appear. So far, headers and a straight fuel rail seem to be common to one engine that does not have the problem. If you have the hot-start issue, or if you don't, …
Last reply by S30Driver, -
Fuel problem 1 2 3 4
by kjphilippona- 39 replies
- 5.6k views
I have gone thru a very hard divorce last July and this old girl has been siting at the X's house to be started and run for a little from time to time. I decides to bring her to my new home this week, the battery was replaced and she started up and ran for only a few seconds then shut down, I could not get it to start again. I do not hear the electric fuel pump running and when i loosen the clamp on the fuel line going to the fuel rail, no fuel squirts out. Can someone please give me a good place to start looking for my problem
Last reply by FastWoman, -
- 5 replies
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I've had this problem for some time now. 1976 280Z. Car has always been pig rich on cold start. Once it warms up it's fine. This happened with the old engine with the Stock Camshaft and the new engine with the 280 degree cam. Things I've checked and changed. 1: New ECU CTS and new harness connector to sensor. Have used DeOxit on all connections. 2: Cold start valve has been completely disconnected. Doesn't seem to make much of a difference if any. 3: Plugs, cap, rotor and wires all new. 4: New thermostat. 5: Just re-adjusted dizzy phasing. PO had it set up so that ignition timing was " Retarded " 6 degrees on cold start-up instead of being advanced 6 degrees. …
Last reply by Captain Obvious, -
- 7 replies
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Simple question. Is the Yellow wire that goes to the BCDD a switched +12V connection. Don't have a BCDD any more, but I may want to use that connection for something else if it is Ignition On +12v. TIA.
Last reply by Chickenman,
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