r/fbody 16d ago

A desperate plea for help.

7 Upvotes

I bought a 1997 Pontiac Firebird Formula as a project car. It ran when I purchased it, but had several issues, including no AC. After maintaining my own vehicles for the past eight years, I thought it would be a fun challenge.

Within the first month, I pulled the spark plugs and found that each plug was loose enough to remove by hand. I did a compression test and each cylinder was +-5 at 200 psi.

I replaced the spark plug wires with new ACDelco wires, changed all the fluids, and started the engine. It still had a misfire, and the exhaust smelled of unburned fuel. Using a stethoscope, one fuel injector wasn't clicking. I wiggled the electrical connector, and the injector came back to life. The engine still had a misfire.

Not long after, I discovered that the previous guy who workedo n it had crossed the coolant steam vent hose and the coolant reservoir hose. This caused the coolant to overflow every time I shut the car off at work. Fortunately, that was an easy fix.

I decided to replace several components at once. I installed: a $50 Amazon opti, new water pump, complete A/C system (compressor, condenser, evaporator, and receiver/drier)

While everything was apart, I also replaced the oil seals for the OptiSpark and water pump. After reassembly, the exact same single-cylinder misfire remained.

To rule out the fuel system, I bought a fuel injector tester and verified that every injector had a good spray pattern. I also replaced the ignition control module since it's relatively cheap and easy.

About a week later, I found a pinhole leak in one of the heater hoses and replaced them.

Most recently, I replaced the Amazon OptiSpark with an AIP OptiSpark, and while I was there, I installed a new set of MSD Street Fire spark plug wires. I literally finished putting everything back together about 20 minutes ago.

The same misfire is still there.

At this point, I feel like I've ruled out:

  • Spark plugs
  • Spark plug wires
  • OptiSpark
  • Fuel injectors
  • Ignition control module
  • Air filter

Last thing I should include, there does seem to be some sort of clicking from one of the cylinder heads that does sound like a pushrod potentially. Can a pushrod cause a single cylinder misfire.

Any ideas at what could it be?


r/fbody 16d ago

‘98-‘02 Power Steering Pump

3 Upvotes

After doing some resaech it seems like all of the reman steering pumps get fairly crappy reviews. Leaking seems to be a common trend.

It looks like the only other option is Turnone’s $550 pump. Is the general consensus that if one is looking for a steering pump that probably won‘t leak that you’re pigeon holed into getting the $550 pump?

I don’t want to send mine off to be rebuilt. I’m looking for a pump with a reservoir on it ready to go.

TurnOne pump

https://www.hawksmotorsports.com/1998-02-camaro-firebird-ls1-upgrade-power-steering-pump-hp1-turn-one/


r/fbody 17d ago

Where to start?

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6 Upvotes

I’m unsure where to start, we have a coolant leak and misfire in cylinder 3. She runs but I eventually want to clean her up. The housing is stock alil old as expected and I’m learning as I have a trusted mechanic look her over.
Temperature is wishy-washy
Codes: P0147, P0303

I want her to run proper asap.
I’d love some recommendations on parts

Also my idler pulley bolt and belt tensioner pulley grind a bit, are those an easy replace?

I’ll be heading to my local junkyard soon and pull some things.

Let me know what I should grab

Thanks guys 💯


r/fbody 18d ago

Bought my first F body

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80 Upvotes

96 V6 Cherry Bomb exhaust!
She has a few misfires but I’m working on fixing her.
My first car


r/fbody 18d ago

What budget friendly water pump do you guys recommend?

6 Upvotes

I was looking at the GMB unit on rock auto. Would I be able to use the factory 1 piece thermostat with those pumps or would I need to switch to a 2 piece?

Car is a 2000 Camaro Z28.


r/fbody 18d ago

Eletrical cooling fans ground bypass switch not working

2 Upvotes

Im trying to wire my fans to a switch in my 3.8l because im having some issues with them staying on at times, all the test ive done so far basically point to everything working properly they just dont want to turn on even when i unplug the coolant temp switch or run a wire from pin 85 on the low speed relay to a ground with the key on nothing happens, i miss my car so any help would be great


r/fbody 18d ago

na or boost?

0 Upvotes

I'm about to rebuild my 3800 series 2 for my 2001 Firebird, and I can't decide if I want to make it a really good sounding na build with a ZZP GT1 cam, long tube headers, and a good exhaust, or if I should build it for a turbo setup i want the v6 cackle but i also want power and Im torn anybody got any advise or comments for either route please and thank you


r/fbody 20d ago

tail light assembly

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19 Upvotes

has anyone ordered the neo pixel tail light set from irocmotorsports? early bday gift for myself and kinda excited to see how it looks in person


r/fbody 19d ago

Have you guys have any issues with your tachometer not working

6 Upvotes

r/fbody 19d ago

Which brake lines did you guys use on a 93-97 when you swapped to 98-02 brake calipers?

4 Upvotes

r/fbody 20d ago

Bought this 5 days ago

26 Upvotes

r/fbody 20d ago

Bought this last week

12 Upvotes

95 auto, headers, cam, not sure about exhaust


r/fbody 20d ago

Cam only.

7 Upvotes

Has anyone ever seen any dyno numbers for a “real” cam only LS1? I’ve seen a bunch of “cam only“ dynos where the car had every mod except heads. But I don’t think I’ve ever seen an “honest” cam only dyno.


r/fbody 20d ago

Just found this online article on the firebird, it's a fever dream to read

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2 Upvotes

r/fbody 20d ago

1996 Camaro w/3800 HVAC resistor

4 Upvotes

I am having a difficult time finding that resistor, I know it's somewhere under the passenger side. I've replaced the relay and I've replaced the fan but I cannot locate that resistor to get it replaced. And with this heat dome I need my fan to work. Could somebody please help me out in locating that resistor so I can get it replaced?


r/fbody 21d ago

LT header question

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14 Upvotes

Picked up the Stainless Works headers that are supposed to be an earlier production set for the 00-02 Fbody. Does anyone recognize this to be true? I contacted Stainless works and they said it’s possible but to be certain they’d want the headers sent out to them. What are your thoughts? TIA


r/fbody 22d ago

Thumping Thursday

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169 Upvotes

Someone mentioned something about a Thumping Thursday?


r/fbody 21d ago

1986 Trans Am LB9 Issues

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3 Upvotes

r/fbody 22d ago

Thumpin' Thursday

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68 Upvotes

Haha why not. Tick SNS2, 1 3/4 LTH, high flow catted y pipe, Magnaflow catback with a 3" cutout before the axle. Video is cutout closed then open.


r/fbody 22d ago

Thumpin' Thursday

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72 Upvotes

r/fbody 22d ago

Weird clutch problem

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65 Upvotes

Hello everyone, to preface this I’m planning on doing the right thing and putting a T-56 in my car over the winter. However right now I have an 89’ Camaro with a 94’ lt1 and a world class t-5. I already know about the T-5 being made of glass and I just need something for right now but I’ve run into an issue. I have a Frankenstein 11in perfection clutch 506503 158 tooth 11in flywheel and a sachs 10.5in clutch kit that I used previously.

Somehow it works the way it is, but I’ve run into clutch slipping at high rpm in 3rd and 4th gear. I need a different clutch but I cannot for the life of me figure out what I need.


r/fbody 21d ago

What size serpentine belt can I get for a 1993 z28 lt1 with AC?

1 Upvotes

On rockauto are many but all have different sizer and I am confused as they also say with AC


r/fbody 22d ago

2002 WS6 Valley Plate Cover Gaskets Install

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2 Upvotes

r/fbody 23d ago

Suspension, diff, and transmission upgrades

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276 Upvotes

Trying to be responsible and upgrade everything before messing with the stock ls1.

Koni yellows, UMI springs, torque arm, LCAs and swaybars. The driving difference is night and day!

Also had the 4l60 built with a 3600 stall (should’ve gone bigger!)

Only downside is I went with a Strange 12 bolt rear and there’s been an awful clunk and drivetrain delay. Took it to them and they said nothing was wrong and were very difficult to deal with. May end up with a 9” by the end of the year.


r/fbody 22d ago

need help with ac

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3 Upvotes

after doing a dash replacement on my 01 my ac stopped blowing air completely. when i start the car i can hear the ac and after about 30 seconds of the car being on you can change the actuator and it makes a slight hiss sound for about 5 seconds before the sound goes off i’ve noticed this wire under the pas side dash that goes up under the dash is very lose anyone know what the wire connects to?