engines dropping when throttle depresses! help!

corewitz · 10-15-2005, 03:59 AM

hey im having sort of a problem. I turn my car over and it starts nearly fine ( the engine jumps a couple times then starts) and it idles pretty normal at first. When the throttle depresses, the rpms die down to almost stalling the vehicle, and then jump back up and revs the engine. If I let it idle for a long time it slowly starts loosing idle speed.

Does anyone have a similar problem or an answer to what could be causing this?

thank you

mrnickleye · 10-15-2005, 04:11 AM

Check for codes first.

rnoswal · 10-15-2005, 04:41 AM

Sounds like it could be your TPS, but not positive on that.

Russ

joel w · 10-15-2005, 05:34 AM

If that all fails, I will add these for you to check also...
becuse it sounds to me like it could be a timing belt issue? when you said.
.>>>> ****( the engine jumps a couple times then starts) ***

whens the last time the timing belt has been changed? mayby it jumped a tooth or two??? ive seen that many times.

My lower crank pully broke the collar that keeps the belt centered on the gear, so that let the belt ride off the front and shredd, luckely the bhg happened and when i pulled the cover off the belt was only 1/4 wide. but had not jumped yet.. hahahha

It also could be any number of things like maybe a plugged catolitic converter? air or fuel filter plugged? bad spark? water in your tank?

but most of these give some warning first, thats why id check the timing belt.

nickvash0104 · 10-15-2005, 11:41 AM

Perhaps one (or more) spark plugs are fouled, had that problem last week, went to accelerate, and instead of going faster, the car went slower

Pulled the plugs and I guess they hadn't been changed in forever (I recently acquired the car) - all 6 were fouled out.

monkihead · 10-24-2005, 06:23 PM

check for vaccum leaks on the intake manifold or intake piping

Clayson · 10-27-2005, 05:10 AM

well they have pritty much summed it up dont know much about the mk3s or any of them cars but hope to some day.... yeah like they said look for vacume leaks an timing belt thats is all i can say to do....

10-15-2005, 03:59 AM	#1
corewitz Stock Join Date: Jun 2005 Posts: 27	engines dropping when throttle depresses! help! hey im having sort of a problem. I turn my car over and it starts nearly fine ( the engine jumps a couple times then starts) and it idles pretty normal at first. When the throttle depresses, the rpms die down to almost stalling the vehicle, and then jump back up and revs the engine. If I let it idle for a long time it slowly starts loosing idle speed. Does anyone have a similar problem or an answer to what could be causing this? thank you

10-15-2005, 05:34 AM	#4
joel w Lexus & 550's Join Date: Aug 2005 Location: In the shadows Posts: 506	sounds like timing belt.. If that all fails, I will add these for you to check also... becuse it sounds to me like it could be a timing belt issue? when you said. .>>>> **( the engine jumps a couple times then starts) * whens the last time the timing belt has been changed? mayby it jumped a tooth or two??? ive seen that many times. My lower crank pully broke the collar that keeps the belt centered on the gear, so that let the belt ride off the front and shredd, luckely the bhg happened and when i pulled the cover off the belt was only 1/4 wide. but had not jumped yet.. hahahha It also could be any number of things like maybe a plugged catolitic converter? air or fuel filter plugged? bad spark? water in your tank? but most of these give some warning first, thats why id check the timing belt.

10-15-2005, 11:41 AM	#5
nickvash0104 3" Exhaust Join Date: Aug 2005 Location: Dallas, TX Posts: 78	Perhaps one (or more) spark plugs are fouled, had that problem last week, went to accelerate, and instead of going faster, the car went slower Pulled the plugs and I guess they hadn't been changed in forever (I recently acquired the car) - all 6 were fouled out. __________________ Black '87 N/A Auto

10-24-2005, 06:23 PM	#6
monkihead SP58GT Join Date: Mar 2005 Location: San Antonio texas Posts: 646	check for vaccum leaks on the intake manifold or intake piping __________________ ....all you need is a small taste of success and you will find it suits you.... monique- better off dead

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

10-15-2005, 04:11 AM	#2
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Check for codes first.

10-15-2005, 04:41 AM	#3
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	Sounds like it could be your TPS, but not positive on that. Russ

10-27-2005, 05:10 AM	#7
Clayson Stock Join Date: Sep 2005 Posts: 7	well they have pritty much summed it up dont know much about the mk3s or any of them cars but hope to some day.... yeah like they said look for vacume leaks an timing belt thats is all i can say to do....

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
JDM 6MGE engines avilable	Supra Goddess	MKII Supra	12	03-27-2015 12:32 AM
lost of power at full throttle??	peedamonkee	MKII Supra	4	01-08-2008 05:50 AM
Why are JDM engines available at all?	finaltable	Non-Generation Specific Questions	3	06-09-2007 12:51 AM
Throttle response	f00g00	MKIII Supra	1	04-13-2006 12:57 AM
throttle body	87supraguy	MKIII Supra	0	02-17-2006 02:40 AM