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Old 04-23-2014, 05:07 PM   #1
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Foxbody needs help!!

I have an 89 Foxbody lx coupe. It has trickflow heads, 1.7 roller rockers,24lbs injectors, gt40 upper and lower, 255lph fuel pump, 3row radiator, bama tune. CAI, e-303 cam and I got it timed and stuff by professionals but when driving the car sometimes it'll just completely shutoff I replaced the I ac sensor and ignition module and I can't figure out what it is! Like it'll just die while driving or sometimes rev real high and stay there till I shut the car down please help!
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Old 04-23-2014, 05:10 PM   #2
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Do u feel a loss in power
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Old 04-23-2014, 05:16 PM   #3
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Yeah there's a loss in power definitely when it happens like it's dying put if I hit the gas it to keep it running it'll have like barely any power then you'll get a strong smell of gas
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Old 04-23-2014, 05:37 PM   #4
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sorry about the dbl post
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Old 04-23-2014, 05:41 PM   #5
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Disregard I missed this part... sometimes rev real high and stay there till I shut the car down please help!
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Old 04-23-2014, 06:41 PM   #6
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Checked for vacuum leak?
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Old 04-23-2014, 06:57 PM   #7
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Put a smoker on it and no vacuum leaks it's blowing my mind
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Old 04-24-2014, 01:35 AM   #8
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If it smells like gas then that means it's not burning it. Try a new TFI coil. Cap and rotor would help also. Sounds like you have a intermittent problem with spark. Start with all the spark components.

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Old 04-24-2014, 01:37 AM   #9
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First thing I would do is look under the dizzy cap and see if the terminals are all worn to crap, specially the TFI one in the middle.

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Old 04-24-2014, 06:24 AM   #10
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Hopefully my distributor isn't bad it's a brand new MSD
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Old 04-24-2014, 06:57 AM   #11
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Quote:
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Hopefully my distributor isn't bad it's a brand new MSD
MSD's are a 50/50 chance of getting a good one
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Old 04-24-2014, 06:58 AM   #12
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So since it's brand new I should try to replace the TFI? And can I use the TFI off my stock distributor?
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Old 04-24-2014, 08:36 AM   #13
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Quote:
Originally Posted by Shifty 5.0 View Post
I have an 89 Foxbody lx coupe. It has trickflow heads, 1.7 roller rockers,24lbs injectors, gt40 upper and lower, 255lph fuel pump, 3row radiator, bama tune. CAI, e-303 cam and I got it timed and stuff by professionals but when driving the car sometimes it'll just completely shutoff I replaced the I ac sensor and ignition module and I can't figure out what it is! Like it'll just die while driving or sometimes rev real high and stay there till I shut the car down please help!
Definitely check the distributor and see what's going on there. This is a very odd issue. Have you always had this problem?

Also, you can give the Bama team a call and see if we can make any adjustments to your tune for you!

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Old 04-24-2014, 08:58 AM   #14
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So since it's brand new I should try to replace the TFI? And can I use the TFI off my stock distributor?
If your stock distributor is in decent shape, I'd try swapping that in as well as the TFI. I agree it sounds like you've having intermittent spark issues. Do you have a stock coil laying around too? It would be nice if you could swap one of those in just to check. Of course, swap all of these components one at a time. Then you'll know which one is at fault.

Let us know if you have any luck!

Shane
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Old 04-24-2014, 09:06 AM   #15
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This problem only started after all those mods I listed iv had a MSD coil on it before the mods and it ran fine, I already had a long talk with BAMA tuning because the tune definitely hates my car most of the time but I will try to swap my old TFI on the brand new distributor and see what happens
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Old 04-24-2014, 12:57 PM   #16
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Does it all of the sudden die or does it start dying like it is running out of batteries?

I would run the codes.

Also run without the chip to see if it still happens.
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Old 04-24-2014, 01:02 PM   #17
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It'll die like il be cruising and then it shut off like no stutter or shake and it did the same thing without the tune but not as bad. Then sometimes il be driving and it like dies and has loss of power but if I keep on the gas it'll keep tuning till I let off
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Old 04-24-2014, 01:56 PM   #18
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I too have a msd blaster TFI coil. It's really good in my opinion. The distributor gotta go. I've heard a lot of bad about those, mainly because our cars do not like the ignition switch. There not hip with the newer style spark enhancement if you wanna call it. You can use the stock distributor and out the new msd cap and rotor on the stock dizzy. Bout the only way you can get anything good outta it.

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Old 04-24-2014, 02:02 PM   #19
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Take off the coil wire in the middle and off the coil. Clean the terminals with a wire brush as good as possible. Take the cap off with the wires still connected and clean the middle terminal and the middle terminal on the rotor. You should be set after that.

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Old 04-24-2014, 02:49 PM   #20
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I'll try that and see what happens. Also whenever I start my car it idle kind of high for awhile until it goes back down
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Old 04-24-2014, 04:09 PM   #21
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I'll try that and see what happens. Also whenever I start my car it idle kind of high for awhile until it goes back down
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Old 04-24-2014, 04:11 PM   #22
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Quote:
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Put a smoker on it and no vacuum leaks it's blowing my mind

Lol that is weird
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Old 04-25-2014, 02:22 PM   #23
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Does it run rough all of the time or is it intermittent? At first I was under the impression it was intermittent. Which is why it sounds like a mechanical spark issue. However, if the issue is all of the time, than it could be a few other things too.

Let us know how the coil and TFI swap goes!

Shane
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Old 04-25-2014, 05:20 PM   #24
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Does flipping the MAF the other way do anything?
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Old 04-25-2014, 05:39 PM   #25
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These are my codes please anyone who has read my problems please tell me out of the codes what to fix so I can safely drive my baby and keep in mine my EGR and A/C are deleted...codes are
24
31
67
81
82
85
84 please help!
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Old 04-26-2014, 01:48 PM   #26
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Quote:
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Does it all of the sudden die or does it start dying like it is running out of batteries?

I would run the codes.

Also run without the chip to see if it still happens.
Well look who finally showed up...
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Old 04-26-2014, 02:27 PM   #27
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These are my codes please anyone who has read my problems please tell me out of the codes what to fix so I can safely drive my baby and keep in mine my EGR and A/C are deleted...codes are
24
31
67
81
82
85
84 please help!
Code

O= KOEO
R= KOER
M= memory, continuous

24..Intake Air Temperature/Air Charge Temperature Sensor Out Of Self Test Range. 0.3 volts (250°F) to 3.7 volts (50°F)(O,R)
A code 24 is normal to get logged if a KOEO self test is performed with a cold engine or air temp is below 50°F. A code 24 is also normal to get logged if a KOER self test is performed with the air temp below ~100°F.


31.. EGR Valve Position/Pressure Feedback EGR Circuit Below Minimum Voltage. 0.24 volts (O,M,R)
Disconnect EVP sensor and install jumper wire between the EVP and VREF terminals.... run a KOEO.
Code 31 should not show as an OD type code and should be replaced by code 34 and/or 35.




67.. Park Neutral Position Switch Circuit Open; A/C On -Manual (O), Manual Lever Position Sensor Out Of Range/A/C On (M,O), Clutch Switch Circuit Failure (M)

Was the transmission in gear when the KOEO was run?...... if so, repeat the KOEO with the trans in neutral.... if it was in neutral, repeat the KOEO while you press the clutch pedal and hold it down for the duration of KOEO self-test.

1. Make sure pin 30 sees a ground condition when you press the clutch pedal or the transmission is in-neutral. You can temporarily splice into pin 30 wire and install a jumper wire to a ground at the frame to check if code 67 disappears..... if not.....

2. Check pin 10 at the ECM connector (ACCS signal) with a DVOM for 12-vdc IGN ON, if 12 vdc are present, need to trace that wire for a short to power.....



81.. Secondary Air Diverter Circuit Failure (O)
TAD solenoid circuit is open, if you're not using the AIR pump...... all you need to install in the solenoid connector is a 75 ohm 3watt resistor

82.. Secondary Air Bypass Circuit Failure (O)

84.. EGR Vacuum Regulator (EVR) Control Circuit Failure (O)

85.. CANP Circuit Failure (O)
Is what vents the gas tank from the fuel vapors accumulated by its "breathing".

33, 81, 82, 84, 85, 44 & 94 are what's called “Soft-Codes” which do not effect the
engines fuel / spark programming. Soft-Codes harmlessly stay dormant in the
computer. They're only purpose is to help you repair those systems back to
original factory specs. Soft Codes will not turn on the Check Engine Light.
There is a resistor pack already built into the harness for the EGR Valve Position
Sensor. No other resistors are required.
Codes 33, 81, 82, 84, 85, are normal when the smog solenoids CANP, EGR, TAB & TAD are deleted.
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Old 04-26-2014, 02:58 PM   #28
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I did KOEO test and I can't remember if it was in neutral or not but none of those codes will cause my problem? It must be a wire or something?
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Old 04-26-2014, 03:07 PM   #29
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Codes are codes and more than likely a cause of some of your problem.
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Old 04-26-2014, 07:00 PM   #30
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Do you have any diagrams or pictures of where to look for a a bad wire or ground?
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Old 04-26-2014, 07:01 PM   #31
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Do you have any diagrams or pictures of where to look for a bad wire or ground?
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Old 04-27-2014, 01:53 AM   #32
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Flipping the mass air does not do anything. The idle high issue should happen when the car is cold to warm up before driving. Now if it does it every time it's up to temp and cold the there's a problem.


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Old 04-27-2014, 01:02 PM   #33
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I cleaned up some wiring and made sure nothing was loose and went driving today and just cruising at 35 and the motor looses power like cuts completely off but everything else stays on!!! My mind is getting more blowin everyday! HELP!!!!!!
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Old 04-27-2014, 01:24 PM   #34
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It's hard to tell you what it is with out physically looking at it

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Old 04-27-2014, 01:52 PM   #35
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Would like bad grounds to the engine cause something like this? And if so where would they be?
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