have codes and diagnosis.What parts?

[sideSHO]

My 91 with 194,000 miles has gave me problems after the tune up.I have a bad idle from about400 to about 1,500 RPM.I also have fuel that bubbles out of the schrader valve and a loud whistle at about 2,500 RPM.I ran some codes.I hope you guys can put some part names with these codes.

18-check base timing and advance function (M)ignition signal erratic

41-system lean.system was lean for 15 seconds or longer (no HO2S switching)

85-2.3l T/C Automatic-3/4-4/3 shift solenoid CANP solenoid.(ALL 1989) 1.9 MFI-system corrected rich condition.

system running lean.Transmission SS1.circuit/solenoid problem.

 

[sideSHO]

That last code was 91.Sorry bout that.Thanks for any help guys!

 

[sideSHO]

Can anyone help?I'll dance at your wedding eek!

 

[BlackOnBlackATX]

well how old are your 02 sensors? if you know theyre old and it tell you theyre not switching it may be somewhere to start, but by no means am i saying that's necessarily your problem.

i would also imagine if fuel is coming out of your schrader valve then you have a pump/pressure/valve integrity problem which may very well be causing rich/lean conditions and idling problems. i would get that fixed first, especially since leaking fuel is dangerous.

good luck man, let us know what happens please.

<small>[ September 29, 2003, 03:07 PM: Message edited by: BlackOnBlackATX ]</small>

 

[sdpatt]

NMI (need more input).

What services were performed at the "tune up?" There is no basic "tune up" in the SHO's maintenance schedule. Changing the spark plugs is about the only thing resembling an old fashioned tune up.

Was the code 18 a KOEO memory code or a KOER hard fault? Was this a recent code? Reset the codes and check for reoccurrence. There is either a bad electrical connection or wiring harness. It could depend on the answer to the question above. Check the electrical connectors to the cylinder identification (CID) sensor, distributorless ignition system (DIS) module and crankshaft position sensor (CPS). Those connectors are all at the top passenger side of the engine.

Why is gasoline bubbling from the fuel rail pressure relief valve? What was being done? The only reasons to touch that valve are to release fuel pressure to replace the fuel filter or pump or to check the fuel system pressure. Somebody introduced debris into the valve seat and has created a fire hazard. Please be careful.

The 41 and 91 codes show that the engine is running lean since both bank sensors are involved. Were these codes in KOEO memory or KOER hard faults? Either way, you probably have a vacuum leak. It's probably a leaking vacuum hose whistling at you.

The code 85 indicates that the EEC did not detect a response from the charcoal canister solenoid purge (CANP) valve. This device is mounted below the coil pack and is connected in-line of the vacuum hose from the top of the throttle body to the the charcoal canister. This part is about $15-$20 at local auto parts stores and usually requires no tools to install. Check the vacuum lines to and from this valve for degradation. They could be the source of one of your vacuum leaks.

I'm married, but I have two daughters. wink

<small>[ September 29, 2003, 03:14 PM: Message edited by: sdpatt ]</small>

 

[sideSHO]

Hey guys thanks for the reply.I have never replaced the O2 sensors.I did replace the fuel pump about a year and a half ago but no problems with that.I didnt touch the schrader valve "as far as I know".Could have bumped it with the intake when I was removing it?The so called tune up was motor craft plugs and wire .044 gap,valve cover/oil well seals.Replaced the intake to head and runners gakets,throttle body gasket also.What stumps me is it was running perfect before all of this.I was just going to drain oil from wells when the plug wires fell apart Thats my luck.I'm going to unhook - cable and check all connections.Then I wil pull codes agin.Will let you know how it goes.Thanks for the help guys.Don't know what I'd do without ya!

 

[sideSHO]

OK fellas I ran some codes.

KOEO:
85 41 91

KOER:
77 41 13 91

Cylinder Balance Test:
9-no problems

For some reason I coud'nt run the Solenoid/Relay Test.Pressed throttle 1/2 way and when I "goosed" it the CE light did'nt flash at all.It just stayed on till I turned the switch off.Ohh Scott you was right.The whistle was a leak at the bolts on the secondary side.Thanks alot fellas!!

 

[BlackOnBlackATX]

this may be a dumb question, but have you checked to see if your plug wires were replaced in the correct sequence? i know its easy enough to over look, and if it just started when the tuneup was done i could see it possibly happening.

i still think you should check out the deal with that schrader valve first though. safety first

 

[sideSHO]

I'm pretty sure I have the wire right on the engine.I had a problem with the coil pack at first but I think I have it now.
1 2 3
fuel rail
4 5 6


5 1
6 2
4 3


Sooo,I guess it is sensor related?

 

[sdpatt]

If you had cleared the codes before you ran that last series of tests, then you still have a vacuum leak, the CANP solenoid valve still needs to be replaced, the IAC valve either does not have its electrical connector attached or it is malfunctioning and you need to learn how to perform the KOER test. You goose the throttle after the CHECK ENGINE light flashes. Check that vacuum line from the CANP soloenoid valve to the top of the throttle body. It tends to deteriorate and be well out of sight. Since you didn't have these problems before the service was performed, the cause is related to the parts that were touched.

 

[sideSHO]

I see that the hose going from the throttle body to the CANP sensor is pretty bad looking.I will replace it.I bypassed the CANP and it seemed to help slightly.I will pick up a new one while at AZ.I will re-check all connections and hoses.Maybe I'll clean what sensors I can.Can you guys tell what sensors to clean?Ohhh and .044 is the right gap for the motorcraft plugs right?Thanks fellas.

 

[sdpatt]

You'd be better off NOT bypassing the CANP solenoid. The hose from the CANP valve to the top of the throttle body sees full manifold vacuum and if breeched, will create a significant vacuum leak. The plug gap spec. is .042" - .046" but since the gap never gets smaller, you would be ahead by gapping to the small end of the range: .042".

 

[projectSHO89]

If in doubt, put a short piece of vacuum hose on the vacuum port and plug it. I ran mine like that for 6 months with a golf tee as the plug. There were never any CANP errors when running the codes while running like this.

Finally found a good use for the tee...

Steve

 

[sideSHO]

I was just bypassing untill I get a CANP solenoid.I cleaned my IAC again and reset idle with no luck.I will pull codes one last time then buy some parts.What is it looking like so far?I know the CANP is one maybe IAC?Ohh yeay,while it was running rough I pulled plug on the IAC and it ran gret for about 30 seconds then died.You guys have been a big help.When I first buttoned it all back up I had such a sick feeling with all the time and money I put in it.Talking to y'all has mede me feel alot better.Thanks again hail