Bouncing Idle

Bowcop · 01-06-2008, 10:02 PM

Hi gang,

I bleed out my coolant system per everyones instructions and the bouncing idle is STILL there alive and well............

Does anyone have anymore ideas?

Thanks!

Bowcop · 01-08-2008, 12:42 AM

Anyone????

PHOENIX · 01-08-2008, 12:47 AM

wish i could answer that question for you, but i don't know much about mk1's.

My best guess would be to start looking at your vacuum hoses, and then onto the intake system of your car (intake, throttle body, mani). sounds like you have an air leak somewhere. I had this problem on my mk2, turned out to be a bad intake manifold gasket. But i wouldn't start there, i would start with the easy stuff.

tjmr2 · 01-09-2008, 10:18 AM

My engine is currently on the engine stand and I confirmed the block antifreeze - coolant bleed valve is indeed almost perfectly centered between the oil filter and oil pressure sender, directly above the AC compressor. A 10mm wrench will fit.

I agree with Phoenix, it's more likely to be a vacuum leak on the intake somewhere.

tymr287 · 01-17-2008, 11:18 PM

Ihave seen it where a dirty throttle body can cause a bouncing idle.

AustinTxMR2 · 01-18-2008, 05:40 PM

Quote:

Originally Posted by Bowcop

Hi gang,

bouncing idle is STILL there alive and well............

Does anyone have anymore ideas?

Thanks!

Last time I had bouncing idle I adjusted the TPS and that solved it. Actually I had to replace it with a used unit because the original was worn out.

John

senn · 01-19-2008, 02:06 PM

ok on the same bouncing idle thing -

1.) where is the sensor that is "detecting" the coolant temp and causing the idle to bounce located (so i can check it out, see where the air is getting trapped exactly, i'm flying blind atm)

2.) TPS - i assume this is near the throttle body itself, if this IS another bone of contention, what does it look like exactly, what do i need to replace to check (i'll go get a replacement ASAP and see if mine has failed/is failing, the car also seems to have some "flatspots" and i'm wondering if this may be a cause too)

tymr287 · 01-20-2008, 11:14 PM

Here ya go, this website helps explain alot.MKI MR2 Write-Up Page

senn · 01-21-2008, 01:34 PM

cheers bookmarked

halo07 · 01-24-2008, 01:07 PM

mine was doing that, but it was missing too, just for the heck of it check grounds. that ended up being my problem with my mr2. i just regrounded the engine and it fixed everything.

01-06-2008, 10:02 PM	#1 (permalink)
Bowcop BMW motorcycles ROCK! Join Date: Dec 2007 Location: Blaine, WA Posts: 9 Thanks: 3 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Bouncing Idle Hi gang, I bleed out my coolant system per everyones instructions and the bouncing idle is STILL there alive and well............ Does anyone have anymore ideas? Thanks!

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01-08-2008, 12:42 AM	#2 (permalink)
Bowcop BMW motorcycles ROCK! Join Date: Dec 2007 Location: Blaine, WA Posts: 9 Thanks: 3 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Anyone????

01-08-2008, 12:47 AM	#3 (permalink)
PHOENIX Beams Owners Group Join Date: Mar 2005 Location: On Hiatus....... Posts: 9,266 Thanks: 92 Thanked 292 Times in 224 Posts Blog Entries: 1 My Google Map iTrader Rating: (49/100% )	wish i could answer that question for you, but i don't know much about mk1's. My best guess would be to start looking at your vacuum hoses, and then onto the intake system of your car (intake, throttle body, mani). sounds like you have an air leak somewhere. I had this problem on my mk2, turned out to be a bad intake manifold gasket. But i wouldn't start there, i would start with the easy stuff.

01-09-2008, 10:18 AM	#4 (permalink)
tjmr2 Cage Fighter Join Date: Jan 2008 Location: Colorado Posts: 410 Thanks: 0 Thanked 62 Times in 59 Posts My Google Map iTrader Rating: (0/0% )	My engine is currently on the engine stand and I confirmed the block antifreeze - coolant bleed valve is indeed almost perfectly centered between the oil filter and oil pressure sender, directly above the AC compressor. A 10mm wrench will fit. I agree with Phoenix, it's more likely to be a vacuum leak on the intake somewhere.

01-17-2008, 11:18 PM	#5 (permalink)
tymr287 Some Skills Join Date: Jan 2008 Location: New Orleans Posts: 74 Thanks: 0 Thanked 7 Times in 5 Posts iTrader Rating: (0/0% )	Ihave seen it where a dirty throttle body can cause a bouncing idle.

01-19-2008, 02:06 PM	#7 (permalink)
senn AW11 Newbie Join Date: Feb 2007 Location: Australia Posts: 96 Thanks: 8 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	ok on the same bouncing idle thing - 1.) where is the sensor that is "detecting" the coolant temp and causing the idle to bounce located (so i can check it out, see where the air is getting trapped exactly, i'm flying blind atm) 2.) TPS - i assume this is near the throttle body itself, if this IS another bone of contention, what does it look like exactly, what do i need to replace to check (i'll go get a replacement ASAP and see if mine has failed/is failing, the car also seems to have some "flatspots" and i'm wondering if this may be a cause too)

01-20-2008, 11:14 PM	#8 (permalink)
tymr287 Some Skills Join Date: Jan 2008 Location: New Orleans Posts: 74 Thanks: 0 Thanked 7 Times in 5 Posts iTrader Rating: (0/0% )	Here ya go, this website helps explain alot.MKI MR2 Write-Up Page

01-21-2008, 01:34 PM	#9 (permalink)
senn AW11 Newbie Join Date: Feb 2007 Location: Australia Posts: 96 Thanks: 8 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	cheers bookmarked

01-24-2008, 01:07 PM	#10 (permalink)
halo07 Freakin sweet Join Date: Sep 2007 Location: Huber Heights Posts: 181 Thanks: 10 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	mine was doing that, but it was missing too, just for the heck of it check grounds. that ended up being my problem with my mr2. i just regrounded the engine and it fixed everything.