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  '79 to '93 -- The Fox Mustang
  1992 Mustang convertible LX

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Author Topic:   1992 Mustang convertible LX
MsLA2003
Journeyman

Posts: 2
From: Santa Clarita,CA,USA
Registered: Oct 2004

posted 10-26-2004 12:27 PM     Click Here to See the Profile for MsLA2003        Reply w/Quote
Hi,
Most everything in my car is replaced,like the new engine head,power steering pump & belt,fuel filter all costing me $2,200 when my car broke down from the engine block having 4 cracks in it.A few weeks after getting it back from the shop,the check engine light comes on again only for about 10 min. off & on throughout the day and it started making puttering sounds like it wanted to die when I slow down but doesn't stall or die,then yesterday,I'm pulling out of a parking spot,and it stalls when the rpm's went too low,hasnt stalled again but I feel like it'll start to stall more frequently,just unclogged the fuel injector and I have two leaks-1 in the transmission(gasket)and one in the power steering fluid thing,but the automechanic said my car will run just fine as long as I keep my fluids up all the time.What could it be?What should I do?How do I keep a freekin' mustang in running shape for at least another year?!?!If this car dies on me,I'm carless leaving me screwed in many ways,I'm car dumb and mustang stupid!HELP!

73torinoqcode
Gearhead

Posts: 515
From: Buffalo,NY,USA
Registered: Jun 2003

posted 10-26-2004 12:42 PM     Click Here to See the Profile for 73torinoqcode        Reply w/Quote
I would replace the Oxygen sensors. That is most likely case for the Check engine light coming on.

MsLA2003
Journeyman

Posts: 2
From: Santa Clarita,CA,USA
Registered: Oct 2004

posted 10-26-2004 02:45 PM     Click Here to See the Profile for MsLA2003        Reply w/Quote
Hi,
Thank you for responding,it's a big help!Yeah,my boss told me she thought that could be it,but what about the stalling?That freaks me out more because in my eyes,puttering sounds like it wants to stall,leading to it actually stalling=eventually stalling all the time,leading to my car eventually just breaking down and not running at all anymore,and I cannot,no way in hell,afford to even finance a car let alone buy one if this one breaks down again.

ddenton749
unregistered
posted 10-26-2004 03:15 PM              Reply w/Quote
First...get a code reader and see what the trouble code(s) are. They will tell you a lot. The EEC system seems very complicated but it's a great system when you understand how it works.

O2 sensors don't fail all that often. They do however, don't work as well with age. I replaced mine on my '91 at 167,000 miles. The original ones are still on my '93 Explorer at 209,000 miles.

[I'm assuming it's a 5.0]

Second...start with the simplest things first. Don't just throw parts at it.

My first thought for poor idle is a vacuum leak. It will cause the low idle and stalling. It will also show up as both O2 sensors seeing a "Lean" condition. When the computer sees this it tries to richen the fuel mixture. When it doesn't work you get a trouble code. (CEL) You can look for vacuum leaks in hoses, etc. You can use starting fluid by spraying it around the manifold gaskets, etc. USE IT SPARINGLY AS IT IS VERY FLAMMABLE!!!

Take a look at the hose between the Mass Air Flow (MAF) sensor and the throttle body. Make sure there are no cracks or holes that are letting in unmetered air. Look at the bottom. A common problem is for the PCV valve to clog up and the oil goes into the throttle body through the vent tube. This oil can trickle down into the hose and degrade the rubber.

My second thought is the Idle Air Control Valve (IACV). It's very common for the IACV to become clogged and/or stuck. It's less common that the electrical part stops working. The IACV is mounted on the throttle body and regulates idle air based on computer input. If it get stuck closed the engine reverts to base idle. The IACV gets clogged with oil from the same PCV valve problem I stated above. Do you get a normal high idle with a cold start?

I can't emphasize enough...get the trouble codes from the computer!!! It can save you a lot of time and money.

Post the codes you get and we'll try to point you in the right direction.

Feel free to email me directly too.

------------------
'73 Convertible, 351C 2V
'91 LX Convertible 5.0
Member: Valley Forge Mustang Club
"Tank, I need an exit."

[This message has been edited by ddenton749 (edited 10-26-2004).]

73torinoqcode
Gearhead

Posts: 515
From: Buffalo,NY,USA
Registered: Jun 2003

posted 10-26-2004 04:38 PM     Click Here to See the Profile for 73torinoqcode        Reply w/Quote
Its a 4 cyl I assume by replacing The Head. And correct see what codes you pull and could also be your IAC Idle air control, throttle body needing cleaned or a few other things. I would guess one of the 3.

[This message has been edited by 73torinoqcode (edited 10-26-2004).]

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