Whenever my car is cold, I get a clicking sound when I'm between 3000 and 4500 RPMs. The sound goes away after a couple of seconds.

Whats the deal???

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1991 Firebird Formula, 305, TPI, Auto...stock till I get some money!!!

 

my 86 iroc does the same thing.is it coming from console/ac area?if so I think its the flapper in the heat unit,not sure,maybe someone knows.

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~mike~
1 superclean 86IROC-Z

 

mhm I never exceed 2000 when my engine is cold. Its better not to "hit the pedal to the metal" when ots cold.

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-1988 Camaro 5.7 TPI-

 

I dont usually gun it when its cold, but when your late for school, you have no choice!

Anyways, its definately coming from the engine...last time I heard this sound, it meant a new 2.8 for my old Firebird, however, thet time it was clickin all the time.

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1991 Firebird Formula, 305, TPI, Auto...stock till I get some money!!!

 

My 84' does the same thing and i have not been able to trace it yet. I live in wyoming so it is usally cold around here. i ALLWAYS warm up my car before i go anyware, even if it means getting up earlier. My Z28 usally idles between 1500-2000 Rpms. Then i afyter the temp reaches 160 minumum, i punch the gas and the rpm's drop off the high idle. (That way i don't hurt the transmission when i put it in Drive) But i am still looking for this nocking sound! Anyone have any clue as to what it could be?

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EMAIL: CTopgun5@aol.com
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84' Z28
New 350 Ci 4 Bolt Main with all L69/HO Parts
4 BBl Carb
160º Thermostat
K&N High Flow Filter
700R4 Trans
15X7 Standard Z28 Wheels, With 215/65R15 BF Goodrich Comp T/A HR4 Tires
Charcol in Color
no T-tops, but wish
New Head unit, JVC KD-SX750
New Kenwood 3-Way 6X9's KFC-6906S
New Pioneer Sub TS-W253C
New Jensen 4-Channel Amp XA-4150
As FiremanZ28 says "Friends don't let Friends Drive Mustangs"
Pic of my Z28, thanks to ZZ4 and his web page: Http://www.geocities.com/ukzz4iroc/z28camaro.jpg

 

Hmmm...Reminds me of an old '86 s-10 Blazer I used to have with the 2.8. She would make the most annoying racket (a clicking or tapping) until warmed up, and then I could still hear it some when I got on it. It was broken bolts on the exhaust manifold at the passenger side. It ran (and still runs) that way for years. Just something to check, because it usually gets better when the engine is warmed.

 

ive got the same thing too...sounds like it might be in the flywheel/converter/trans area but i just have no clue what it is

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350, Comp 262, Edelbrock Performer intake 600 cfm carb and exhaust, headers

 

Hmm....maybe we all need new engines...

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1991 Firebird Formula, 305, TPI, Auto...stock till I get some money!!!
Former owner of an 88 2.8 Firebird....RIP

 

i wouldnt rule out a high pressure exhaust leak. once the engine warms up it could cause the gasket to expand and properly seal it. but while its cold it could not be sealing it properly. good luck


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Rick
90 Camaro RS 305 TBI
350 on the way!!

 

Sounds like I can join the club too- I get that 'clatter' noise whenever the car's cold and it's been running for about 10 seconds. The noise runs for another 10 seconds while I'm waiting for the car to warm up then it goes away. Doesn't do it any other time. I had disconnected my heat riser valve (vaccuum operated) for a while and the noise went away- when I reconnected it it seemed to return....


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Original owner - '84 T/A w/stock 305HO 5-speed