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Technical => Drivetrain Tech => Topic started by: massCougarxr7 on October 09, 2008, 04:11:02 PM

Title: stall and stall again....
Post by: massCougarxr7 on October 09, 2008, 04:11:02 PM
Hey guys (and ladies)...my 88 xr7 is idleing really rough, and every time i start it it bogs out and dies.. when it does idle it almost stalls out and then picks up again,but then bogs out again... it also stalls when i turn the wheel to take a sharp turn... please help i know someone has had this problem b4... thanks, i apprciate your help and value everyones opinion.
Title: stall and stall again....
Post by: Kitz Kat on October 09, 2008, 04:12:18 PM
Codes
Title: stall and stall again....
Post by: vinnietbird on October 09, 2008, 04:36:46 PM
What's the info on your car?Details.
Title: stall and stall again....
Post by: dominator on October 09, 2008, 05:06:25 PM
Fuel pump.
Title: stall and stall again....
Post by: V8Demon on October 09, 2008, 05:58:58 PM
Quote from: kitzdnm;238930
Codes



Thank you; at least SOMEONE said it...

How's it run while in gear with a load on the motor out of curiosity?
Title: stall and stall again....
Post by: Kitz Kat on October 09, 2008, 08:14:07 PM
Ask but don't partite?
Title: stall and stall again....
Post by: massCougarxr7 on October 09, 2008, 08:33:56 PM
iTs stock 5.0 135k only mod is a cone intake. Runs the same with load but not as bad. sorry kitz had to take care of sumthin. other than that my dash is dissconnected but still in place with evrything connected(wiring n such) no brackets.-long story
Title: stall and stall again....
Post by: daminc on October 09, 2008, 10:28:59 PM
All your plug wires connected? and good?
Title: stall and stall again....
Post by: massCougarxr7 on October 10, 2008, 09:50:13 AM
Yeah i replaced them a few weeks ago and the plugs. My power steering pump is really leaky ... i was wondering if a bad pump could put more stress on the motor but my belt doesnt squeak....
Title: stall and stall again....
Post by: vinnietbird on October 10, 2008, 09:56:23 AM
TPS?Timing?IAC?
Title: stall and stall again....
Post by: massCougarxr7 on October 10, 2008, 10:10:38 AM
Ive never touched the distributer, or messed with the timing. its always ran great...when its beeen running for a little while it will idle fine at red lights but when i hold the brake and turn the wheel, she stalls. im gonna do a compression check this weekend and see what happens, im really hoping that its not somthing bad like a bad valve or so... theres no lack of power at all just in low rpm it doesnt  run steady.
Title: stall and stall again....
Post by: vinnietbird on October 10, 2008, 11:49:16 AM
Is it blowing any smoke from the exhaust?Losing any water?Maybe a head gasket going bad......small,tiny leak.
Title: stall and stall again....
Post by: Haystack on October 10, 2008, 09:36:47 PM
could also be a slipped tooth on the timing... If you pull codes you'll be 90% more likely to get it fixed. I never pulled codes on my car and fought to get it fixed by replacing everything, and it ended up being a vac line on the map sensor. The difference is about 10mpg.
Title: stall and stall again....
Post by: massCougarxr7 on October 10, 2008, 10:07:36 PM
no smoke or water... and how do i pull codes in the 88?
Title: stall and stall again....
Post by: Kitz Kat on October 11, 2008, 03:37:20 AM
http://www.therangerstation.com/tech_library/OBD_I.html
Title: stall and stall again....
Post by: V8Demon on October 11, 2008, 07:17:36 AM
Quote
when its beeen running for a little while it will idle fine at red lights but when i hold the brake and turn the wheel, she stalls.


There IS a sensor for that.....Thunder Chicken had mentioned what it was called once before.  I can't even remember otherwise I'd find the link to the thread and post it for reference.

**EDIT**

I did find this:

Quote from: merccougar50
If the engine stumbles only when turning the wheel, but recovers when the steering wheel is still, the idle kicker switch on the steering rack is not increasing the idle (via opening the IAC) to compensate for the power drawn by the power steering pump.

This failure occurs more likly the you would think. If the idle is not increased the power draw the pump creates can actually stall a five liter engine at low idle speeds.


I remember reading something about some replacement racks not having this switch as well...
Title: stall and stall again....
Post by: TurboCoupe50 on October 11, 2008, 08:50:55 AM
Quote from: V8Demon;239099
There IS a sensor for that.....Thunder Chicken had mentioned what it was called once before.  I can't even remember otherwise I'd find the link to the thread and post it for reference.

**EDIT**

I did find this:



I remember reading something about some replacement racks not having this switch as well...


AFIK no 5.0 had a pressure SW on the rack... Only used with those wimpy little motors...
Title: stall and stall again....
Post by: massCougarxr7 on October 11, 2008, 08:51:03 AM
Alright ill replace the kicker switch soon and see what happens....as for pulling codes... idont think it will work because when im at a light my speedo (copies) my tach until i start moving... Ex-if i idle at a grand in park my speedo will be in same position...around 30mph...so im gussing that would interfere with my codes... its not a short, just the way my dash is resting in the car...
Title: stall and stall again....
Post by: massCougarxr7 on October 11, 2008, 08:53:30 AM
ok so now what would i do turbo?
Title: stall and stall again....
Post by: jcassity on October 11, 2008, 03:31:00 PM
Ive never seen a presure switch on any of our birds or cougars.
Ive often been curious about the step in pulling codes where you cut the wheel for this switch as well.

Take your belt off and run the car for a short period of time and see if the symptom changes.

also, after the engine is hot, take your belt off and see if your smog pump pully spins free.  If it does not, thats your power draw.
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