84 3.8L Low on Power Reply #15 – March 01, 2017, 10:29:39 PM Quote from: atengnr;459537Well, I got the code scanner, and gave me 23, 84 (I have EGR vaccum line plugged), 13, 63. I ordered a throttle position sensor. I assume this sensor malfunction could cause the issues that I have had (LOW POWER, hesitation, stall at idle)??? Thanks alot.Yep... When the TPS failed on my '93 Lightning it had about same power as a 6cyl with two bad plug wires... Quote Selected
84 3.8L Low on Power Reply #16 – March 01, 2017, 11:16:05 PM Cool thanks. This low idle speed code, is this related to tps or something else? Quote Selected
84 3.8L Low on Power Reply #17 – March 02, 2017, 11:07:13 AM In their diagnostics Ford says repair first code given then recheck, often additional issues are corrected or maybe other code(s) were just phantom in nature... Quote Selected
84 3.8L Low on Power Reply #18 – March 04, 2017, 12:42:53 PM Quote from: atengnr;459428I did note that vacuum was 16 inches at idle. Quote from: TheFoeYouKnow;45945516 inches is still PRETTY low for a stock engine at idle. At 16 inches on a speed density car, you'll be spraying more fuel. Yup 16" at idle on a stock 3.8 V6 is low. It should be around 20" at idle. My Thunderbird (mods in signature) makes 17" at a 700rpm hot idle. A stock 5.0 HO makes around 18-19" at hot idle, and a 5.0 SO makes around 20" at hot idle (from what I've measured over the years). Quote Selected
84 3.8L Low on Power Reply #19 – March 05, 2017, 09:50:22 AM Intake Leak? From my past experience with these motors, my engine has zero blowby up in the air cleaner housing, which tells me that the cylinder bore/ rings are still in good shape. Vacuum lines are original but Ive found no issues on visual inspection. Thanks. Quote Selected
84 3.8L Low on Power Reply #20 – March 05, 2017, 11:45:21 AM Fix the TPS code, then if still a issue worry about low vacuum... My bet is most of you problems/codes will be corrected... Quote Selected
84 3.8L Low on Power Reply #21 – March 11, 2017, 09:41:20 AM Finally got a motorcraft TPS from rockauto. Ill let yall know howshe runs. Quote Selected
84 3.8L Low on Power Reply #22 – March 12, 2017, 09:15:02 PM Hello go figure, I think I need a starter solenoid....I replaced TPS, and wen to start, and got nothing except cabin lights went out when trying to turn over, but no click. I charged battery, and still does the same thing. Sounds like solenoid no?? Quote Selected
84 3.8L Low on Power Reply #23 – March 13, 2017, 12:48:33 AM My first step would be to pull the small red wire off the solenoid and stick my meter on the wire.See if you have battery voltage when you try to crank.Voltage: solenoidNo voltage: neutral safety switch or ignition switch. Make sure you are in park or neutral. Quote Selected
84 3.8L Low on Power Reply #24 – March 13, 2017, 02:01:33 PM Quote from: atengnr;459684Hello go figure, I think I need a starter solenoid....I replaced TPS, and wen to start, and got nothing except cabin lights went out when trying to turn over, but no click. I charged battery, and still does the same thing. [COLOR="#FF0000"] Sounds like solenoid no??[/COLOR]NO.... Not likely if cabin lights are going out, you're dropping voltage and solenoid would have to be dead shorted to ground which is going to burn up battery cables... My bet is the battery didn't charge or is bad... Quote Selected
84 3.8L Low on Power Reply #25 – March 13, 2017, 02:38:35 PM I have had this check your battery cable earth's and live track them back and clean and have a good look at the battery terminals sounds like a bad connection breaking down under load. Quote Selected
84 3.8L Low on Power Reply #26 – March 13, 2017, 03:24:03 PM oops, my bad. I missed the "cabin lights going out" when cranking part. That kinda proves the solenoid is good. Quote Selected
84 3.8L Low on Power Reply #27 – March 13, 2017, 06:03:08 PM Quote from: mr glee;459690I have had this check your battery cable earth's and live track them back and clean and have a good look at the battery terminals sounds like a bad connection breaking down under load.I'll second this, but all the suggestions are good. Quote Selected
84 3.8L Low on Power Reply #28 – March 13, 2017, 07:05:32 PM Quote from: TurboCoupe50;459687NO.... Not likely if cabin lights are going out, you're dropping voltage and solenoid would have to be dead shorted to ground which is going to burn up battery cables... My bet is the battery didn't charge or is bad...I put on a charger yesterday and initially pulled some decent current, but charged within a few hours (amperage dropped to < 1). I just drove the car 2 weeks ago, and pulled negative terminal a few days after parking. Quote Selected
84 3.8L Low on Power Reply #29 – March 13, 2017, 07:08:22 PM Interestingly, in order to get cabin lights to come back on, I need to pull negative terminal on battery and reinstall. Quote Selected
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