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4.9 Suddenly Won't Idle. TPS Reads .392 v With Foot Off the Gas
(by Warlordsix, started: 07-19-2020, last post: 2020-07-20 00:23:33 CEST)
On an easy drive last night the engine suddenly lost its ability to idle. Actually, it would barely idle, maybe 300 rpm, but I suspected it would die if I didn't keep my foot lightly on the pedal. Car has always previously idled well, 650-750 rpm. Put my ALDL Scan and ALDLDroid on it this am,...
Score: 633, Size: 75 bytes
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4.9 wiring harness?
(by dtrader, started: 03-21-2019, last post: 2019-03-22 05:44:14 CET)
Anyone still making the wiring harness for the 4.9/4t60e swap? I’ve got the uncut originals... figured I’d inquire before starting it myself
Score: 633, Size: 27 bytes
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4.9 Fiero Oil Leak from Head Gasket
(by Fiero Tom, started: 05-29-2015, last post: 2015-05-29 19:20:13 CEST)
I have a lot of oil on the exhaust manifolds and I've already replaced the valve cover gaskets. How hard is it to replace the head gaskets with the engine in the car?
Score: 633, Size: 45 bytes
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Calling all the Cadi 4.9 experts. Starter question.
(by zmcdonal, started: 09-27-2015, last post: 2016-05-27 03:38:56 CEST)
Ok I need some advice from the 4.9 guys. This isn't really Fiero related but I have a 91 Eldorado with a 4.9 and you guys know more and are a more reliable source than the cadi forums. I need a new starter for my 4.9. I got the old one out but it is a super tight fit to remove without dropping the...
Score: 633, Size: 61 bytes
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2.8 ---> 4.9 motor question on wiring fuel pump?
(by Spadesluck, started: 04-10-2017, last post: 2017-04-10 19:26:28 CEST)
I am going to put in a new fuel pump and was wondering if while doing that I should change the wiring according to Darth? I plan on using a Walbro 255 with the 4.9 and be done with it.
Score: 633, Size: 59 bytes
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4.9 with Allante Intake
(by 87convert, started: 07-04-2017, last post: 2017-07-07 18:30:28 CEST)
The heater hose connection to the intake is made to a formed pipe which is inserted into a hole in the rear of the intake. The pipe on my intake has come loose. There does not appear to be anything mechanically holding the pipe in place. I don't think that pushing the pipe back into the hole...
Score: 633, Size: 33 bytes
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Distributor for a Cadillac 4.9
(by patkagi, started: 08-07-2018, last post: 2018-08-23 13:11:29 CEST)
My distributor fell apart the other day and I am looking for a replacement. I'm running a Cadillac 4.9 v8 with a 4.5 intake manifold and a Holly 500 carb. The distributor bushing froze up and destroyed the housing. If anyone has a replacement for sale, please let me know. I'm anxious to get...
Score: 633, Size: 38 bytes
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4.9 in a Fiero coolant overflow bottle[s] question
(by Daleford, started: 05-11-2015, last post: 2015-05-15 06:40:42 CEST)
I have a 4.9 in my Fiero with a 3 core aluminum rad up front. In the rear, above the engine I added a Moroso fill neck adaptor. This adaptor takes a regular rad cap and has an outlet for an overflow bottle. Do I add an overflow bottle at this point [engine end of car] when I am using the stock...
Score: 633, Size: 60 bytes
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4.9 Videos! Turbo?
(by Sideway-swede, started: 06-19-2015, last post: 2015-06-27 20:04:27 CEST)
Does anyone have any good videos of 4.9's? There are some on youtube and streetfire, but I thought It'd be nice to gather what we've got here. I've tried really hard to find some good 4.9 turbo vids, but I've has been unsuccessful. All i can find is videos of the "heir" of the engine in a lambo...
Score: 633, Size: 32 bytes
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which motor swap? sc3.8 or 4.9 caddy?
(by atcrider1, started: 07-24-2014, last post: 2014-07-26 02:43:43 CEST)
whats up guys, i have a 1984 se that im looking to do a motor swap in .right now its a 2.5 3 speed auto, i really dont want another duke lol. i have two motors, but i cant decide on which one i want to use. right now its between a sc3800 out of a regal, or a 4.9 caddy v8. both have low miles. what...
Score: 633, Size: 47 bytes
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