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#1 TFRACING

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Posted 16 October 2018 - 02:13 PM

1989 Chrysler Conquest TS, Auto, This one has me confused, with in the first 10-15 min after driving it I can make full 10lbs of boost the first time I stab it, after that it will only go to 5 lbs. No hesitation and the revs keep going up, but it feels like its staving for air to me. I have replaced VAC lines, VAC Advance, plugs, wires, PCV, AIR FILTER, Injectors, injector clips ( it did have a bad hesitation, gone now) Im not a tech and I know I must be missing something.  I also have the exhaust off the car and Im just running the front cat. Any help would be great.
Thanks in advance
Tony.





#2 importwarrior

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Posted 16 October 2018 - 02:39 PM

Sounds like a leak in the intercooler pipe or coupler not sealing properly.
If you can do a boost pressure test.

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#3 croquest87

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Posted 16 October 2018 - 03:59 PM

Hope you are not leaning out. You should really have a afr gage installed. It's much easier to know what your car is doing.  My 87 when l first bought it had rust in the tank and filters where severely plugged. It wouldn't boost and all kinds of weird symptoms.

#4 BC_99

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Posted 16 October 2018 - 04:04 PM

Stock boost gauge or aftermarket mechanical?

BC
Steering coupler replacement U-Joints are available here...
http://www.starquest...howtopic=145280

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#5 TFRACING

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Posted 16 October 2018 - 05:40 PM

View PostBC_99, on 16 October 2018 - 04:04 PM, said:

Stock boost gauge or aftermarket mechanical?

BC
Stock boost gauge, also the tank is very clean with no rust and all the filters have been replaced. I did just make a boost pressure tester and no leaks, one more thing to check off the list. lol

#6 87redcat

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Posted 16 October 2018 - 05:56 PM

BC beat me to the question. Invest in a good vac gauge it will be a lot more accurate. The stock ones are known to not be accurate
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#7 croquest87

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Posted 16 October 2018 - 06:12 PM

View PostTFRACING, on 16 October 2018 - 05:40 PM, said:


Stock boost gauge, also the tank is very clean with no rust and all the filters have been replaced. I did just make a boost pressure tester and no leaks, one more thing to check off the list. lol

Cool  sounds like your gage has issues  mechanical gage should do the trick  good luck.

#8 TFRACING

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Posted 16 October 2018 - 06:39 PM

View Postcroquest87, on 16 October 2018 - 06:12 PM, said:

Cool  sounds like your gage has issues  mechanical gage should do the trick  good luck.
I will give that a try. Thanks for the help.

#9 TexasQuest

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Posted 19 October 2018 - 11:20 PM

Good quality aftermarket gauges are invaluable for these cars.
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View PostJohnnyWadd, on 04 March 2010 - 10:01 PM, said:

my shaft was big i dont know what your talking about.




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