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This is a link to the car I have purchased. The car was in bad shape when I got it. It did not run,shift, or move on its own even after I got it running. Had burnt wires and plenty of poor work done to it.
The car now runs fantastic but runs very rich. 9.8 all of the time.
In the add it states it has 42lb injectors. Is there any way for me to validate that without taking the injectors out and measuring their flow? ie. numbers on the injectors somewhere. I cannot find any but not sure where they would be. Or is there any other way to tell the board that there is 42 lb injectors in there.
Also does anyone know if the o2 sensor is used in the L-jetronic system with a Powerdyne supercharger kit purchased from 928 motorsports. I have contacted 928 motorsports and have had no response from them.
Brian,
If you can post an upclose picture of an injector, someone on this list will be able to tell you what kind of injector you have. Alternatively, if you can't post a picture, you can provide the product/model number of the injector which will accomplish the same thing.
A larger injector would be consistent with the supercharger installed on your engine, but I don't know if a 42# injector is correct.
Someone with more knowledge of what you have from 928 Motorsports will chime in directly.
A larger injector would be consistent with the supercharger installed on your engine.
Running larger injectors in an L-Jet car without some kind of piggy back fuel injection controller is not a good idea. These kits typically use stock fuel injectors with an FMU which increases fuel pressure under boost to add more fuel.
Originally Posted by soontobered84
Petza914 has a Motorsports system on his car. He is knowledgeable.
His car is CIS, nothing in common (fuel system wise) to this car.
Personally I'd stop starting the car at all until this is figured out, that much over fueling has to be washing down the cylinder walls.
Running larger injectors in an L-Jet car without some kind of piggy back fuel injection controller is not a good idea. These kits typically use stock fuel injectors with an FMU which increases fuel pressure under boost to add more fuel.
His car is CIS, nothing in common (fuel system wise) to this car.
Personally I'd stop starting the car at all until this is figured out, that much over fueling has to be washing down the cylinder walls.
Hacker is correct. What I should have said is that running larger injectors is consistent with "a" (not the) supercharger. But that hinges on some type of additional fuel management system.
He is also correct in that Petza's car is CIS and that would negate any relationship to what you are looking at.
Hacker is 3 for 3!!! Take his advice and don't run the engine until you get this straightened out, as it could cause irreversible damage to your cylinder walls.
See? I told you someone more knowledgable would chime in directly.
Thank you Hacker. I should have thought of you with your 16 valve supercharged
Thanks for the replies so quickly.
I do not drive the car or start it. The only time I start the car is when I am trying something different to make it run leaner (as of now nothing has worked)T.
There are no markings on the injectors that I can find. I will take a pic and post it.
Here is what I have tried so far.
1) mixture screw which in the supercharger manual says it will change the fuel / air mixture. It wont.
2) turning down the fuel pressure to 34lb. made no difference.
3) checked timing and it is at 20 degrees advanced at 3000 rpm as per the supercharger manual says take out 3 degrees of timing.
Is there a piggy back for the L-Jetronic?
I will post a pic asap.
As the guys have said, my car is setup on K-Jet so no electronics and all mechanical. It's actually a great system for superchsrging and my ratios seem to be right where they should be when cruising, under full boost, light throttle, decel, etc. Though I do have a 928ms Powerdyne stage 2 setup with heat exchanger and intercooler, I can't offer any help on L-Jet fueling.
Hey guys just an update. Took the injectors out today and had them all checked. They are good and are only 24lb/hr injectors. So that means that the injectors are not the problem.
I have now moved on to something else.....the temp sensor.
Is there anyone out there that can explain exactly how this works. I believe that the computer sends out a voltage to the sensor and depending how much the sensor grounds the board knows the temp of the motor?
Temp II sensor, not to be confused with the temperature time switch. If your harness is original, it's the sensor with the blue connector on top of the coolant bridge, not the one facing forward.
Hotter Coolant = less resistance. IIRC this has a direct control over the pulse width of the injectors.
It's common for these to be out of spec, but usually on the cold end causing a lean condition before the engine is fully warmed up. It's not uncommon to find a resistor added to the temp sensor to "fix" this. Years ago I bought 10 new sensors and installed the one with the highest resistance on the cold end. All of them had the same or similar value on the hot end.
If your sensor tests out OK, then I would run the same test again from the ECU side of the harness to rule out any wiring issues.
Car looks familiar.
Looks like the car of Chewy8000, Tristan?
If so, there are a lot of posts on Rennlist that would give history. If you dont already have it.
I don't recall ever meeting him, say at Frenzy, but the car always looked very cool in the posts. Looks like it still shows very well cosmetically. Bring that one back to life please!!
Thank you for connecting me with Chewy8000.
I have sent him a pm and hope he responds.
Yes I believe that is the car I have purchased and I have read as many of his post as I can.
The more I can find out about this car the better I can bring it back to its glory.
What a great community this is.
01-19-2021 | 02:58 PM
supercharged 1981 928 injectors?
