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Allante or Cadillac 4.9 adjustable fuel pressure regulator?
(by Johns 4.9, started: 01-08-2021, last post: 2021-01-19 03:56:26 CET)
Hello Fiero Guys and Gals,Anyone have success adapting or building an adjustable fuel pressure regulator for the Allante 4.5 engine or the Cadillac 4.9 engine? I'm running out of ideas. Any suggestions or comments would be appreciated. Thanks!Cheers,John
Score: 1000, Size: 69 bytes
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4.9 caddy engine distributor
(by Collector, started: 09-13-2021, last post: 2021-09-17 19:02:28 CEST)
when using a caddy 4.9, and using a CARB and a 1 wire Distributor with NO Computer Controls, what Distributor is needed ? was remembering maybe a OLDS ? Help. thanks
Score: 633, Size: 41 bytes
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4.9 converted to OBD2, Megasquirt...has anyone done this?
(by fierobear, started: 07-04-2021, last post: 2021-10-07 20:38:12 CEST)
Has anyone used an aftermarket ECM with a 4.9 swap?
Score: 633, Size: 67 bytes
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Tuned up the 4.9 and now it won't start
(by paulcal, started: 01-05-2014, last post: 2014-06-23 02:56:42 CEST)
I just put new plugs, plug wires, cap, rotor, coil and ingnition module in the 4.9. The ignition module I installed last week and the rest of it today. After installing new plugs and wires is when the problem started that it wouldn't start. The coil cover on the 4.9 is clearly marked as to what...
Score: 633, Size: 47 bytes
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Can a 4.9 have A/C?
(by Darren's 87 coupe, started: 05-05-2019, last post: 2019-05-06 20:26:31 CEST)
Mine is gone now but when I was building mine, I never got a clear answer if anybody had gotten the 4.9 system to work.
Score: 633, Size: 37 bytes
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4.9 idle problem
(by ozzman333, started: 05-27-2014, last post: 2014-06-03 19:15:01 CEST)
I done a 4.9 swap with a 4 speed manual, when I start the car it idles ok,when I drive it idle stays high and when I come to stop light and push clutch in the idle stays high for a few seconds then idles down, it has only started doing this recently, didn't do this after I first did the swap.
Score: 633, Size: 26 bytes
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4.9 with MSD 6AL spark plug gap
(by falcon_ca, started: 09-23-2019, last post: 2019-09-25 18:10:46 CEST)
I read somewhere that for better performance when a MSD 6AL module is installed in a 4.9 setup, the gap of the the spark plugs better be readjusted.Can't remember the thread.Anybody knows ?
Score: 633, Size: 41 bytes
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Connecting Rod Bearings in a 4.9 Caddy Motor.
(by Capt Fiero, started: 12-07-2013, last post: 2013-12-08 23:02:33 CET)
As many of you know my new motor installed in my 4.9 5spd Fiero was delivered to me with an engine knock. I got a partial refund and told the shop I never wanted to hear from them again. That was nearly a year ago. I paid them for the other work they did, and took my car to deal with myself. ...
Score: 633, Size: 56 bytes
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Anyone have a wiring diagram for the Fiero Factory (Injection Tech?) 4.9 harness?
(by Raydar, started: 12-01-2013, last post: 2013-12-02 18:50:49 CET)
I'm in the process of swapping to a different ECM. I'm looking for a diagram of the harness that the Fiero Factory used in their swap.I already have the Cadillac service manuals, but I'd like to know the specific tweaks/changes the FF made before I tear into the harness.If nothing else, I'd like to...
Score: 633, Size: 88 bytes
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messed up 4.9 harness need help
(by racingfortheson, started: 01-12-2015, last post: 2015-01-14 13:32:38 CET)
I'm building my harness using this page,http://www.fiero.nl/forum/Forum2/HTML/098096.html and everything thing seems to be going good when I realized I messed up. My 4.9 has 2 o2 sensors and I've unplugged one from the computer plug and now don't know where to pit it back. Can someone help and then...
Score: 633, Size: 47 bytes
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