Anyone successfully replaced the injectors in a '90 Deville 4.5 with something other than the factory units. If so what did you use? I replaced the injectors on my 91 TPI 'vette with some Ford units that are much less expensive and work just fine. Just wonder if there is something similar available for the caddy's.
Thanks
Walt
I think, it can be done (you mean bigger injectors) - only then you must reprogram computer
IMO Cadillacs computer can learn new fuel maps itself - correct, if i am wrong... How sensors and computer works
i put 4.9 injectors in my 4.5 and they work fine...
Did it run okay after you did that. My 90 is missing very hard and I suspect injectors. I bought a whole used fuel rail with injectors from a 4.9 for $100 and was wondering if they worked okay in yours.
I used some 19lbers from MSD. Also, the stock TPI Camaro's injectors work. You'll probably suffer on your MPG a little more... I did, and your mpg average and instant thing will be off. You can do an onboard diagnostics test to see if it is in fact your injectors that are giving you problems. Search for injector testing, or something related.
Anyone successfully replaced the injectors in a '90 Deville 4.5 with something other than the factory units. If so what did you use? I replaced the injectors on my 91 TPI 'vette with some Ford units that are much less expensive and work just fine. Just wonder if there is something similar available for the caddy's.
Thanks
Walt
Walt,
Are you looking for more performance or stock performance replacements? If the latter, I would think there are a number available at various price ranges. If the former, won't you need to make other adjustments to the fuel delivery system and ECU to accommodate the increased demand?
Kev
I am just trying to find replacements for the ones in my 4.5 liter. I think they are bad and I went ahead and bought the whole fuel rail thing from a 4.9 liter. Ill post results.
[quote=wsherrard]Anyone successfully replaced the injectors in a '90 Deville 4.5 with something other than the factory units. If so what did you use? I replaced the injectors on my 91 TPI 'vette with some Ford units that are much less expensive and work just fine. Just wonder if there is something similar available for the caddy's.
Thanks
Walt[
I just replaced the injectors in my 90 DeVille, 4.5 with NEW, GP Sorensen injectors. I had had a nightmare with injectors, (replaced one, then another went out; pulled all eight and had them refurbished & bench tested...then two more failed...gave up and replaced them all). I was about to buy Delco injectors (@$150 ea. at GM) until I thought about it; the original injectors had started failing at about 60K miles.... did I want to use Delco and have them go out at 120K miles? I don't think so. I started investigating alternatives and found that Standard Motor Products makes the after market injectors for most of the after-market suppliers------including GM Delco, at their Greenville, South Carolina plant.
I found that AutoZone offered the GP Sorensen, J-41 injector for $59.99 ea. These units are of the new design with three (3) injector orfices instead of one as on the original Delco injectors. As most of the Autozone stores only have one (or none) you will have to either order them over the internet, or call all of the stores in your area and pick up onesey, twosey's.
Check out the internet pricing and if you plan to purchase from your local store take a copy of the internet pricing, because they are $79.99 at the stores, but they will honor the internet pricing.
Hope this helps!
JeftyJ
