I have a 85' GS , completely Stock, and I have an issue. Whenever I am trying to maintain speed up a hill or hit the gas off idle I get a strange chirping noise. This chirping noise also seems to restrict power. Here is a video (not mine) that is displaying the exact same noise my car is making (at time 1:05 in video). What do you suppose this is?

 

Wheres the video? Without the video, common chirps could be...

-Little valve in the ACV
-belts
-pulley
-vacuum leak
-throw out bearing


-brakes sticking (would explain feeling of lost power)?
-wheel bearing?

 

.

 

Here is the YouTube video

 

Why is your exhaust pipe coming out the wrong side of the car?

And what are those funny horny things in the engine bay?

Doesn't look stock to me.

"This chirping noise also seems to restrict power."

I think we're being scammed guys.

 

Sorry for the confusion! The first youtube video is not my car, but my car is making a similar noise. This is my first post and I'm on my phone so it's a double whammy... I will get an actual video of my car up soon!

 

That's a 2nd gen that's why. Saul exhaust and our 1st gens the hoo opens backwards.

 

Ok! Here is an in car video of my actual car making the noise (skip forward to 1:00).

 

And my belts have been changed less than 2 weeks ago (before the video) and the problem still occurs.

 

Nice car and very nice video. That's a first gen for sure, and the chirping is perfectly obvious.

Only happening when you wind it out at 40 mph, that's weird.

One solution might be to just shift up before it happens. Does it still do it when you hit 4000 rpm in 5th gear?

I don't have a clue what it is, maybe a loose belt or pulley?

Doesn't sound serious, whatever it is.

 

Maybe clutch related?

 

does it cause the car to shake?

 

It does not cause the car to shake, and it is also present when in neutral when the gas pedal is tapped so I dont believe it is clutch related

 

Something air pump and ACV related possibly then. Maybe the little diafram in the ACV is leaking. That could cause a big vacuum leak and a fluttery chirping noise especially on decel.

 

I will check the ACV, however there is no issue on decel, only chirps under heavy acceleration/ load

 

Ray Green, it happens in every gear and roughly throughout the entire RPM range; it seems to just depend how much load the car is under

 

The most common time when it occurs is when I am on my way to work. The highway I take has a slight incline with a long bend (about a mile long) right after the on-ramp. I can get up to 60-65 mph on the on ramp with no issues. But when I hit the incline and begin going around the bend, my car physically will not go above 45 mph and chirps uncontrollably, the more i push it the louder and more violently it chirps. I have tried shifting around gears, 3rd at high rpms, 4th at medium and 5th at lower rpms and the car will strain and chirp no matter what and will not go above 45 mph (in any gear, at any rpm) which inevitably leads to angry motorists cruising around me and giving me nice encouraging hand gestures Once I reach the top of the incline and the road flattens out the car is completely fine and reaches 65+ mph with no issues and no chirping.

 

1. my friend had that FC! i don't know the guy in the video though...

2. the chirping. that noise could be preignition/detonation, so step one is to change your fuel filter. step 2 is to check the pump, there is a volume test in the FSM thats very easy to do.

the next thing is to check the timing, and make sure its close. then you want to check to make sure the cap, rotor, wires are good. the wires also need to be checked to see if they go to the right places (t1 on the cap to T1 on the engine...)

and then if you don't have the correct spar plugs in there, you should.

i suspect you'll find that the fuel pump is a little weak, this lets the float bowls in the carb go low, which leans it out, and there you go.

 

Thanks for the reply. The spark plugs and wires were replaced along with the cap. All plugs are in the correct location. The timing has been checked and double checked. Also the fuel lines were cleared with compressed air and the fuel filter was replaced. All of this was done less than 3 weeks ago and the car was not driven for one of those weeks. I was also thinking it was the fuel pump, I ordered a Holley red with regulator and it will be installed next weekend (waiting on shipping). If that doesn't fix the problem I will be back asking questions!

 

I agree with J9fd3s, it sounds like preignition to me.

Did the problem start when the new parts were installed, or was it occurring prior to then?

I know you have checked and rechecked the wires, timing etc, but sometimes I have found myself repeatedly checking for problems and repeatedly overlooking the obvious, and then having to kick myself when it finally jumped out at me. I would re-examine everything to make sure.

 

The problem was there before replacing all of the parts. I will check all the parts again tonight after work.

 

The holley red is overkill... See if you can return it and buy a Redline pump.

http://www.ebay.com/itm/like/331128230073?lpid=82
Theres 2 sizes of it that float around. One that reads 4-6 on the body and has 8mm fittings on both ends, and one that says 6-8 that has a 10mm inlet, and an 8mm outlet.

They are both totally silent, and they deliver a hell of a lot more than the "35 GPH" and "65 GPH" that the varying weber redline dealers rate them at. I bought one of the "35 GPH" pumps thinking it would be just enough for a stockport 12A and Nikki, and it turned out filling up buckets just as fast as my 80+ GPH carter.

 

I understand your concern with the Holley red. Unfortunately it's already on its way so I'm just going to use it and see how it performs! If I don't like it I'll swap it out and look into the redline

 

lmao, the 80gph carter is more like 35 gph...

 

Well, mine was:

http://www.summitracing.com/parts/crt-p4600hp/overview/

I was underwhelmed by that fuel pump. Not enough fuel for the cost, size and noise it made. It says "72 GPH" but like I said before, it was outperformed by much smaller pumps.