what would cause this?

89hatchbackGT · 04-25-2002, 01:33 PM

when i started my car up yesterday the rpm went down to about 50- 100 rpm and sounded like it was about to stall. After about 2 seconds the rpm shot back up and the car ran fine. Also sometimes when i start my car when it is cold it makes a sortof tapping sound right on the start for about 3 seconds and then its fine. What could cause both of these symptoms?

jerrys84 · 04-25-2002, 02:05 PM

any mods???

BilLster · 04-25-2002, 03:06 PM

vacum leak for idele.

rocker low oil lifter where the noise coming from ???

89hatchbackGT · 04-25-2002, 08:22 PM

I can't tell exactly where its coming from. Its kinda tricky, sometimes i think its coming from under the car like in the exaust somewhere. Sometimes i think its the engine making the noise. I'm just gonna get a new x pipe put on and see if that helps it, if not i'll have the engine inspected and possibly rebuilt as i'm planning on getting a super charger and i don't want to blow the thing up.

gtsr515 · 04-25-2002, 08:55 PM

what kind of mods do you have?

Is it a bad throw-out bearing, flywheel, engine low on oil?

89hatchbackGT · 04-26-2002, 05:43 PM

its an automatic with only bolt-on mods like hedders, dynomax super turbo mufflers, mac cold air induction,and 14 degree timing. I think thats about all the mods as far as the engine goes.

Ieatcamaros · 04-26-2002, 09:16 PM

Get a stethoscope, like the doctor's use. Except get a mechanics stethoscope. This will help you out a lot when looking for things like this.

I had an 87 ranger 4x4 and it was making this ticking sound, but I couldn't tell exactly where it was coming from. I got a scope and stuck the pointer on the right vavle cover. Damn, that was loud. Turned out it was a stuck lifter.

Hope this helps.

1BAD89 · 04-26-2002, 09:57 PM

You are describing what 99% of cars do when they are cold. Let it warm up and you'll be fine.

89hatchbackGT · 04-27-2002, 01:10 AM

You think so? i hope its something that simple but i'll check it out anyway just for peace of mind.

04-25-2002, 01:33 PM	#1
89hatchbackGT Registered Member Join Date: Mar 2002 Location: Huntsville Alabama Posts: 44	what would cause this? when i started my car up yesterday the rpm went down to about 50- 100 rpm and sounded like it was about to stall. After about 2 seconds the rpm shot back up and the car ran fine. Also sometimes when i start my car when it is cold it makes a sortof tapping sound right on the start for about 3 seconds and then its fine. What could cause both of these symptoms? __________________ Http://www.geocities.com/stang89gt2000 I like an escalator because an escalator can never break. It can only become stairs. There'd never be an escalator out of order sign, only escalator temporarily stairs-sorry for the inconvenience sign. --Mitch Hedberg

04-25-2002, 02:05 PM	#2
jerrys84 Registered Member Join Date: Feb 2002 Location: minnesota Posts: 129	any mods??? __________________ 91 LX 'work in progress' previous stangs; lightly modded 84GT 81 2.3 converted to 302 auto

04-25-2002, 03:06 PM	#3
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	vacum leak for idele. rocker low oil lifter where the noise coming from ??? __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

04-25-2002, 08:22 PM	#4
89hatchbackGT Registered Member Join Date: Mar 2002 Location: Huntsville Alabama Posts: 44	I can't tell exactly where its coming from. Its kinda tricky, sometimes i think its coming from under the car like in the exaust somewhere. Sometimes i think its the engine making the noise. I'm just gonna get a new x pipe put on and see if that helps it, if not i'll have the engine inspected and possibly rebuilt as i'm planning on getting a super charger and i don't want to blow the thing up. __________________ Http://www.geocities.com/stang89gt2000 I like an escalator because an escalator can never break. It can only become stairs. There'd never be an escalator out of order sign, only escalator temporarily stairs-sorry for the inconvenience sign. --Mitch Hedberg

04-25-2002, 08:55 PM	#5
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	what kind of mods do you have? Is it a bad throw-out bearing, flywheel, engine low on oil? __________________ Remember...2nd place is 1st place for losers!

04-26-2002, 05:43 PM	#6
89hatchbackGT Registered Member Join Date: Mar 2002 Location: Huntsville Alabama Posts: 44	its an automatic with only bolt-on mods like hedders, dynomax super turbo mufflers, mac cold air induction,and 14 degree timing. I think thats about all the mods as far as the engine goes. __________________ Http://www.geocities.com/stang89gt2000 I like an escalator because an escalator can never break. It can only become stairs. There'd never be an escalator out of order sign, only escalator temporarily stairs-sorry for the inconvenience sign. --Mitch Hedberg

04-26-2002, 09:16 PM	#7
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Get a stethoscope, like the doctor's use. Except get a mechanics stethoscope. This will help you out a lot when looking for things like this. I had an 87 ranger 4x4 and it was making this ticking sound, but I couldn't tell exactly where it was coming from. I got a scope and stuck the pointer on the right vavle cover. Damn, that was loud. Turned out it was a stuck lifter. Hope this helps. __________________ The sig says it all.

04-26-2002, 09:57 PM	#8
1BAD89 Tubbed and Juiced Join Date: Mar 2001 Location: Tulsa, Oklahoma Posts: 1,861	You are describing what 99% of cars do when they are cold. Let it warm up and you'll be fine.

04-27-2002, 01:10 AM	#9
89hatchbackGT Registered Member Join Date: Mar 2002 Location: Huntsville Alabama Posts: 44	You think so? i hope its something that simple but i'll check it out anyway just for peace of mind. __________________ Http://www.geocities.com/stang89gt2000 I like an escalator because an escalator can never break. It can only become stairs. There'd never be an escalator out of order sign, only escalator temporarily stairs-sorry for the inconvenience sign. --Mitch Hedberg