Iīm Markus from Germany. I got an 1976 Seville since a few days. But it is not running. I ordered an shop manual but itīs not arrived jet. And checked some things whitout special information.
The enging fire uo really nice and run on all 8 Zylinders when i spray brake cleaner into the throttle body.
I check both fuel pumps and they are dead. Now i got an old fuel pump from an other car. I tried to get fuel to the rails. After an while it fired up and runs. But not at all Zylinders. The fast idle works, when it get a little bit warmer the idle drops to normal speed. But it wonīt run really good when the idle drops. And the engine stops. Okay thats only an interim solution with a lot of fuel leaks
Now iīm thinking if i buy the pumps and 2 or 3 injectors and try to get it run. Or if i start to make an conversion to carburetor. Maybe somebody can help me with his experience.
And maybe somebody knows where i get an in tank sending unit. Because this is completely rusted,
Isn't that car throttle body? A problem with the distributor or also the HEI can cause problems like you are having.
Because of where you are it would probably be easier in the long run to convert to a carberator then finding parts in the future.
i will think about the conversion or to get it run like its origin.
But first we have to get the Car Registered again in Germany. Some of the owners before lost the documents of the car. In germany that is a kind of bullshit you never seen.
if that makes to much trouble and cost to much money it will go out in parts. But i wanīt to get the car on the streets again. It is in a very good condition.
Hi Markus, I bought a 76 Seville 4 years ago. When I got it it ran way too rich & would foul out the plugs quickly. The problem was the ambient air temperature sensor in the throttle body. If that and/or the coolant temperature sensor are bad, the car will run badly. The shop manual is very helpful. I also used this site before my manual arrived http://www.cadillacseville.org/, lots of good info & troubleshooting. Unfotunately I don't know see a source for the sending unit. Over time, I replaced both fuel pumps & 1 injector. The car is currently running great on the fuel injection.
so some good and bad news. The car runs with the new fuel pumps very good at a copule of time.
But now it wonīt start any more. Also when i spray brake cleaner in the throttle body. I got sparks on the spark plugs and the voltage is there on the distributor. Fuel is also coming.
If you plan on converting to a carb & use the original pump setup, you will need a regulator to cut the pressure down to 5-7 lbs.
Personally, I'd go with an Edelbrock Performer with the choke & EGR allowance and a Q-jet.
Okay i get some more infos.
I changed the fuel filter and nothing changes.
i checked the pressure regulator with my compressor. And round about 40psi it opens.
Both of the temperatur sensors have about 900Ohm when iīm right the coolant and air sensors are the same or do they only look like the same from above?!
The injectors are clicking with ignition on and turning the throttle slowly.
The car keeps running, when i pump the gas Pedal fast. I have no second man for measure the speed sensor. Could that be the symptom for that?
and again some tests.
The speed sensor gives me the trigger signal, when i measure the resistant. And the 9V is clean.
The fuel flow must be okay. When i calculate it, itīs round about 115L per Hour.
When i squeeze the tube after the fuel pressure regulator that i get a higher pressure nothing changes. Also when i plug of the vacuum.
Now i havenīt really an idea, what it could be. I try to get an fuel pressure meter to check it in the car.