4.5 performance parts
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1984 Fleetwood Brougham E28 Service Soon Code
HT4100 4.1, 4.5, 4.9Hello. I’m new here. I just bought a 1984 Fleetwood Brougham and it runs really good. The service soon light is on. When I first ran the diagnostics test it gave me the 52 code for the battery. So I reset it and it turned off. This morning I went to turn the car on and after a few minutes the...- 0
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mr_ramirez84 · updated
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1984 Eldorado Biarritz (HT4100 Top End Overhaul)
HT4100 4.1, 4.5, 4.9Hello, my name is Alex and I recently purchased a 1984 Cadillac Eldorado Biarritz with the horrid, faulty, problematic HT4100. I’m really starting this thread to learn and grow as a mechanic and to learn more about my car. So, so far, this is what I know! There are very obvious stains in the...- 13
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Alex84Eldo · updated
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1992 ETC - 4.9 unstable idle
HT4100 4.1, 4.5, 4.9Have a new-to-me well-preserved 92 ETC with 23k miles. Only went 1k miles since 2008. On the test drive, noticed lumpy idle. Hauled it home and changed all fluids and filters except fuel filter, due to running a can of BG fuel system cleaner for about 150 miles and running out close to all of...- 4
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4.1L Engine Swap
HT4100 4.1, 4.5, 4.9I have an 86 eldorado that I've rebuilt the 4.1L engine twice in. I have a 92 fwd Fleetwood that has a 4.9L engine. I want know if anyone can tell me if I can swap the 4.1L with the 4.9L. The Fleetwood engine is great but the rest of the car is having serious problems.- 3
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Ginoc86 · updated
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4.1 main bearing thump
HT4100 4.1, 4.5, 4.9i have a 87 deville with the main bearing thump what is the part number thati need to correct the problem,and do i have to repalce both halves of main bearing number 1. does anybody have a copy of the gm bulletin that they could post on the board thanks. oh i am getting a egr code too would this...- 5
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