--------------------------I have a 1976 Eldordo with factory EFI. Am curious to know what the expert opinions may be on if the EFI should be swapped for a carburator? How reliable are the old EFI's and how available are EFI parts etc?
That's been my experience too. If the FI worked, I would run it as long as it worked good. Replacement parts are hard to come by though. I don't think I would trust it for a cross country trip either.--------------------------
if the EFI should be swapped for a carburator
the original EFI system was SO bad - they made a carb-swap kit -
and the vast majority did the swap -
if you LOVE to tinker - and REALLY ENJOY being frustrated -
stay with the EFI -
if - on the other hand - you would rather go for a nice - relaxing cruise -
put the carb on it -
Good info. The 500 C.I. fuel computer is not as easy as the 350 or 425 to come by in my experience. Agree on the pump. The other liability is the fuel lines.The main problem with those old computers are they are old.. They say the parts are hard to come by, but I have a bunch of them.. There is a member of this board , Bruce Roe, that fixes the computers and some mods to keep them running with less problems... If I had your car I would just keep some spare parts on hand, like a spare computer and a few temp sensors.. I would take out the low pressure fuel pump in the tank and put in a high pressure pump.. That way you can take off the high pressure on the frame and just use one pump... And do Bruce's extra relay mod to run the pump to help save the computer...The only part that is hard to find is the fast idle heater valve... I had a lot of them , but there all gone now...
Farout. Any details of pix of the Haltech?Apeman... I have a used 500 computer that has been gone over by Bruce that looks the day it was made... Somebody will need it one of these days... I have a fuel injection set-up on a 472 run by a haltech... I made a fast idle replacement set-up... It is a solenoid valve that is closed by a timer circuit board and the haltech at a temp.. It closes when it reaches 150 F or if it is already warm it fast idles for 60 seconds...
OK. I have to shoot some pictures for this site myself. Have to move the rocket launcher parts out of the way first.I will be taken it out of storage sometime real soon for the summer.. The first week of april is pretty safe no more snow.. I'll take some pictures and post them then...
Especially at or just above idle. The uphill intake manifold on these engines may be the culprit.I agree! I had a '76 EFI Fleetwood and it was the smoothest running Cadillac I've ever owned.
Did you use the same injectors at the same pressure? Still bank injection, or change to sequential? The same ignition, or an ECU programmed advance? Did you change the temperature sensors? How long did it take to get everything tuned up? Did you use an OX sensor? Did you change the idle air motor? Is your old ECU available for another Cad owner? Bruce RoeHi, here in Brazil I have a 76 Eldorado EFI and tired of trying to fix the fuel injection source. I installed the FuelTech, which is a programmable fuel injection and had no more problems. All original parts have been exploited and appearance of the engine remained the same. For the 500 engine, the fuel injection models used are the FT 300, FT350 and FT400. Not cheap, but solved my problems.
Manufacturer's website http://www.fueltechems.com/home.html
**********************Did you use the same injectors at the same pressure? Still bank injection, or change to sequential? The same ignition, or an ECU programmed advance? Did you change the temperature sensors? How long did it take to get everything tuned up? Did you use an OX sensor? Did you change the idle air motor? Is your old ECU available for another Cad owner? Bruce Roe