99 4runner Puttering and Shaking.

blackout138 · 01-29-2013, 03:18 PM

Hi,
I'm not sure how to diagnose this problem with my 99 4runner V6. When I start the car, the whole car putters and shakes for about 30 secs, then my rpms automatically jump up to around 1500-1800 and then it starts to feel smoother. But not completely smooth. When driving there is still the feeling of the car puttering, but it's most noticeable in idle. Also there feels to be a loss in power. Just yesterday it died on me while stopped.

I looked around the forum and was told to check the spark plugs and coils, which I did. Also, I replaced those about a year ago. Could it be a bad alternator? Does anyone have any ideas? Thanks in advance.

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kball · 01-29-2013, 05:50 PM

Any smoke when you first start it and it's sputtering for 30 seconds? If not it sounds like you need to clean your throttle body and IAC.

blackout138 · 01-30-2013, 11:20 AM

I haven't noticed any smoke coming from under the hood. I'll clean those and update. Thanks kball.

kball · 01-30-2013, 04:43 PM

No smoke under the hood is great but I meant excess from the exhaust. Like as in white smoke with a sweet musty smell.

Gregs94Toy · 01-30-2013, 05:12 PM

That's almost what mine's doing 2.7L...I am going to change the fuel pressure regulator soon as everything else besides fuel injectors have been changed...

**vital22re** · 01-30-2013, 05:56 PM

You may have a dead cylinder or a massive air leak. Was any work done recently? How old are the spark plugs? any codes? CEL light on?

rworegon · 01-30-2013, 06:00 PM

Stuck/dirty IAC valve?

Or, a leaky HG that is dropping coolant into the cylinder as it cools off and then it runs wonky until the coolant clears the cylinder. Are you using any coolant?

blackout138 · 02-02-2013, 01:20 PM

Quote:

Originally Posted by kball

No smoke under the hood is great but I meant excess from the exhaust. Like as in white smoke with a sweet musty smell.

Oh I see. I'll start it up and check it out.

Quote:

Originally Posted by vital22re

You may have a dead cylinder or a massive air leak. Was any work done recently? How old are the spark plugs? any codes? CEL light on?

Nothing recent. It started about 1 week ago. The spark plugs, coils, and a fuel injector were changed about a year ago. I do have a p0420 code and another p0420 code pending.

Quote:

Originally Posted by rworegon

Stuck/dirty IAC valve?
Or, a leaky HG that is dropping coolant into the cylinder as it cools off and then it runs wonky until the coolant clears the cylinder. Are you using any coolant?

I'm planning to clean the TB and IAC today. I am and I haven't noticed any overheating issues either.

rworegon · 02-02-2013, 02:08 PM

So no coolant loss?

blackout138 · 02-08-2013, 08:10 AM

Sorry it's been so long since a reply. I've been out of town.

I was checking the coolant, when I noticed a large tear in the rubber vacuum hose that connects to the throttle body. The connections seemed loose too. I replaced the hose and tightened up everything and it seems to be running fine now. Uggh really stupid of me for missing something so obvious. Thanks for all the help everyone!

01-29-2013, 05:50 PM	#2 (permalink)
kball Registered User Personal Sales Rating: (0) Join Date: Mar 2010 Location: SoCal Posts: 230	Any smoke when you first start it and it's sputtering for 30 seconds? If not it sounds like you need to clean your throttle body and IAC. __________________ 1996 SR5 4WD Auto Toytec Ultimate with OME 890's plus 10mm spacer 60028 OME shocks Treadwright Guard Dogs 265/75 -16 B&M 70268 with Magnefine filter

01-30-2013, 04:43 PM	#4 (permalink)
kball Registered User Personal Sales Rating: (0) Join Date: Mar 2010 Location: SoCal Posts: 230	No smoke under the hood is great but I meant excess from the exhaust. Like as in white smoke with a sweet musty smell. __________________ 1996 SR5 4WD Auto Toytec Ultimate with OME 890's plus 10mm spacer 60028 OME shocks Treadwright Guard Dogs 265/75 -16 B&M 70268 with Magnefine filter

01-30-2013, 05:12 PM	#5 (permalink)
Gregs94Toy Registered User Personal Sales Rating: (0) Join Date: Jul 2011 Location: Anaheim,Ca Posts: 96	That's almost what mine's doing 2.7L...I am going to change the fuel pressure regulator soon as everything else besides fuel injectors have been changed... __________________ 1996 Toyota 4-Runner 2WD/200k+miles Automatic/K&N Filter Carter Fuel Pump Anthracite Metallic

01-30-2013, 06:00 PM	#7 (permalink)
rworegon Contributing Member Personal Sales Rating: (0) Join Date: Nov 2010 Location: Columbia River Gorge, Oregon...east side Posts: 2,783	Stuck/dirty IAC valve? Or, a leaky HG that is dropping coolant into the cylinder as it cools off and then it runs wonky until the coolant clears the cylinder. Are you using any coolant? __________________ 95.5 Tacoma 3.4L Auto, bought with 0.8mi. FSMs TSBs P/N & diagrams (source for OEM parts on east coast) PNW OEM Parts source - Titus-Will, Tacoma, WA

02-02-2013, 02:08 PM	#9 (permalink)
rworegon Contributing Member Personal Sales Rating: (0) Join Date: Nov 2010 Location: Columbia River Gorge, Oregon...east side Posts: 2,783	So no coolant loss? __________________ 95.5 Tacoma 3.4L Auto, bought with 0.8mi. FSMs TSBs P/N & diagrams (source for OEM parts on east coast) PNW OEM Parts source - Titus-Will, Tacoma, WA

01-30-2013, 11:20 AM	#3 (permalink)
blackout138 Registered User Personal Sales Rating: (0) [OP] Join Date: Dec 2008 Posts: 17	I haven't noticed any smoke coming from under the hood. I'll clean those and update. Thanks kball.

02-08-2013, 08:10 AM	#10 (permalink)
blackout138 Registered User Personal Sales Rating: (0) [OP] Join Date: Dec 2008 Posts: 17	Sorry it's been so long since a reply. I've been out of town. I was checking the coolant, when I noticed a large tear in the rubber vacuum hose that connects to the throttle body. The connections seemed loose too. I replaced the hose and tightened up everything and it seems to be running fine now. Uggh really stupid of me for missing something so obvious. Thanks for all the help everyone!

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02-08-2013, 08:10 AM
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