Having issues with my wagon

[Bowser1989]

Ok here is the scoop... My 1989 Colony park is having surging issues. My engine is the 5.0 efi monster but every time I start it and even on long runs it doesn't like to idle sometimes and even stalls when I come to lights. I cleaned out the IAC valve twice already and recently cleaned a whole bunch of black out of the upper plenum but it still surges! I almost have to double foot the brake to keep it from jumping at a stop. Is this still a IAC valve issue or is this a torque converter issue?

Any help will be appreciated!

[86VickyLX]

Ok here is the scoop... My 1989 Colony park is having surging issues. My engine is the 5.0 efi monster but every time I start it and even on long runs it doesn't like to idle sometimes and even stalls when I come to lights. I cleaned out the IAC valve twice already and recently cleaned a whole bunch of black out of the upper plenum but it still surges! I almost have to double foot the brake to keep it from jumping at a stop. Is this still a IAC valve issue or is this a torque converter issue?

Any help will be appreciated!

Scan it for codes.

[91waggin]

Yes do a koeo and koer test. Instructions can be found here. Report back to us with codes.

Things that might cause this problem:
IAC
TPS
MAP

[Bowser1989]

Um where can I go to get it scanned cause Advance won't do it cause they don't have the right connector and everywhere else wants to charge me. Should I still do the second route?

[86VickyLX]

Um where can I go to get it scanned cause Advance won't do it cause they don't have the right connector and everywhere else wants to charge me. Should I still do the second route?

http://fordfuelinjection.com/?p=13 Scan it yourself.

[1987cp]

Sad when people who ought to know can't tell someone to connect a jumper wire and count flashes.

Your Haynes manual also tells how to do this, IIRC, and also has a handy reference chart. You do have a Haynes manual, right?

[91waggin]

Or I spelled it out in the link on my previous post. Since you have an 89 with a yellow CEL in the dashboard, all you need is a paperclip, pen and paper.

[Bowser1989]

Ok cool I'll have to do that this weekend. I do have a haynes manual I just never thought to look to see how to get codes from it lol. I always assumed it would be the OBD1 ford specific connector or something. The other symptom is if I slightly put on the gas it dives on its face almost stalls then picks up and goes. It doesn't do that if I go into the pedal halfway or full off of the line. The engine is having issues overall apparently the oil pan gasket is leaking big time and I'm not looking forward to have to lift then engine up just to drop the pan enough to get my fat fingers in between the mess... but I still love the old girl!

[86VickyLX]

Ok cool I'll have to do that this weekend. I do have a haynes manual I just never thought to look to see how to get codes from it lol. I always assumed it would be the OBD1 ford specific connector or something. The other symptom is if I slightly put on the gas it dives on its face almost stalls then picks up and goes. It doesn't do that if I go into the pedal halfway or full off of the line. The engine is having issues overall apparently the oil pan gasket is leaking big time and I'm not looking forward to have to lift then engine up just to drop the pan enough to get my fat fingers in between the mess... but I still love the old girl!

It is a ford specific connector, but all you need to do is ground the STI connector that's pictured in the link I posted. Chapter 6 of your haynes manual will cover this too. It will also have the code meanings as well.

I've done the oil pan in the car. It sucked, but it got done, while I was in there it got a new oil pump. I'd recommend you replace the PCV valve, grommet and screen. Since I'm willing to be that the screen is clogged. Make sure it's not leaking from another place valve covers are known to leak, as well as intake manifolds.

[91waggin]

Ok cool I'll have to do that this weekend. I do have a haynes manual I just never thought to look to see how to get codes from it lol. I always assumed it would be the OBD1 ford specific connector or something. The other symptom is if I slightly put on the gas it dives on its face almost stalls then picks up and goes. It doesn't do that if I go into the pedal halfway or full off of the line. The engine is having issues overall apparently the oil pan gasket is leaking big time and I'm not looking forward to have to lift then engine up just to drop the pan enough to get my fat fingers in between the mess... but I still love the old girl!

I'm gonna guess here and say that you need a new throttle position sensor. Once you get codes, that will probably point us in the right direction. Love the ASCII art in your sig, btw.

[BerniniCaCO3]

Regarding the oil pan gasket: not too bad for just the long pieces of cork. Undo motor mounts, lift the engine up a couple inches, tranny can be left alone.
But there are also semicircular seals in front and back, and those I had a hell of a time strongarming into place, even with the engine upside down on an engine stand.

Might be easiest to take the engine out, then.
And hey, do a bunch of other stuff while you're at it! Anything old, rotting, leaking, rusting

[Bowser1989]

Regarding the oil pan gasket: not too bad for just the long pieces of cork. Undo motor mounts, lift the engine up a couple inches, tranny can be left alone.
But there are also semicircular seals in front and back, and those I had a hell of a time strongarming into place, even with the engine upside down on an engine stand.

Might be easiest to take the engine out, then.
And hey, do a bunch of other stuff while you're at it! Anything old, rotting, leaking, rusting

I was thinking the same! lol but money right now is tight I did find a guy selling his engine for $500 but anyways...

Thanks for the compliment on the sig took some time to figure out lol.

I tried taking the codes off and I'm all confused and not at my house by my haynes manual this week.

I got // /// // /// // ///// /// /// /// ////// /// /// ///

[Bowser1989]

Probably wrong cause it's my first time so I'll try again tomorrow and be more precise on the timing and such

[91waggin]

Yes, try again. However it appears that the first code you've got there is a 23, which indicates throttle position sensor is a problem. Also a code 33, which means that your EGR valve isn't working. Here's a link to what all the codes mean:

http://www.grandmarq.net/vb/showthread.php?31462-EEC-IV-2-digit-trouble-codes

[cld783]

get a short video if possible and we'll tell you what the codes are. sometimes the seperator blinks can make it confusing.