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Unread 05-07-2013   #1 (permalink)
pinkblob66 is offline Apprentice


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Default Vacuum leak/topical questions.. 96SVT

okay.. i fixed the electrical issue that i was having after a head gasket replacement on driver side... (if you want to know what i'm talking about here is the thread)...

http://www.allfordmustangs.com/forum...ease-help.html


NOW the car is back together turns on strong and sound better than before...... until you hit the gas.. i haven't put it under load yet, but when I tap the throttle it has either a vacuum leak or the response time is waaaaaaaaay off... need help with this big time

another thing... even after the gasket replacement its running hot... even hotter i would say.. this could be because it's getting better flow, but when i was under the car (while running) i noticed the driver side catalytic converter (first one) was smokin up big time.... could this be the issue to over heating/running rough??
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Unread 05-07-2013   #2 (permalink)
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My money is on the timing chain(s). It is pretty common to get one or both off a tooth and it would act like this. You can try doing a compression test, see if one bank is significantly off from the other.
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Unread 05-07-2013   #3 (permalink)
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pinkblob66: " NOW the car is back together turns on strong and sound better than before...... until you hit the gas"

*I won't say it's a Vacuum issue for sure (Vacuum being higher at low rpm and all.) ... Timing somewhere (Electrical or mechanical) more like it.
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Unread 05-07-2013   #4 (permalink)
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I marked everything off and everything lined up when back together.. I would say it would have to be something electrical just because there are issues going on... for example.. the battery gauge is saying it's not getting enough volts (on the low side of meter), the temp gauge is going frantic when you first turn key to acc, and doesn't show it being as hot when its reading it before engine then shows it waaaaaaay past the hot mark, not to mention one side of the thermo housing is still cold and thermo has been replaced already, and let's not forget the fan doesn't want to run unless it's unplugged from the sensor... I'm banking on electrical haha..
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Unread 05-07-2013   #5 (permalink)
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oh and if you hit the driver side window the instrument cluster goes crazy.. i checked and rechecked the grounds.. idfk what to do
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Unread 05-07-2013   #6 (permalink)
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Quote:
Originally Posted by pinkblob66 View Post
oh and if you hit the driver side window the instrument cluster goes crazy.. i checked and rechecked the grounds.. idfk what to do
Electrical YES....
Don't feel too bad, I had two separate cars that:
1) GM- Windshield wipers only worked when left blinker was activated. (Ticked many people off in the rain for sure!)
2) Toyota- Headlights would not work unless you banged on the dashboard once in awhile... otherwise the "High Beams" worked 100% of the time with no problems at all.
Electrical sucks and I hate it.... always difficult to track down the issue, especially if it's an intermittent problem.
I am starting to wonder if your PCM is having the issue? Computers have to be recalibrated from time to time as well... not just cars going in for a tune-up and everything is "A" okay.
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Unread 05-07-2013   #7 (permalink)
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yeah.. i think that could be another issue.. it's not even my car.. if it were my car i would have taken all that crap off and called it a day if any one has any other advice it would be great...
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Unread 05-08-2013   #8 (permalink)
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I am not an experienced electrical tech. at present so this may be way out there, but is there an aftermarket stereo put in?
Bare with me for a second: I have two friends that had aftermarket stereo's put in that caused problems with I am assuming wires getting crossed during the install that caused all sorts of electrical anomalies for them a lot like some of the one's you mentioned. That is one reason why I have kept my OEM system intact it does not take much to get an electrical system off track and cause headaches even things you would not think are related could have been effected. All I am suggesting is that if it does have an aftermarket stereo... don't count that out as being part of a bigger issue, even if the stereo itself seems to be working correctly... theirs did too. I mentioned the PCM, but I am not convinced that is the source of "All" your issues.
Good Luck, hopefully someone with more automotive electrical knowledge will chime in soon an teach me something!
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Unread 05-09-2013   #9 (permalink)
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FWIIW, the radio and the cluster share the same ground behind the center console. It's frequently messed up during a radio install.

Did you follow the V6 coolant re-filling procedures exactly?

http://www.allfordmustangs.com/forum...3.html#2604913

How did you "fix" the radiator core support grounding issue?

Is the motor grounding strap in place?
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