i need help

[JK.]

hello everyone i need help i cant tell if its a miss fire or a air fuel mixture thing but i just changed my headers to long tubes and put in a cold air intake but when im driving once it hits 3k it sounds like its dropping cylinders but once i rev it past it it’ll run and drive fine its a 94 mustang Gt 5.0. i need to know asap

 

[Noobz347]

Pull ECU codes.

 

[JK.]

Pull ECU codes.

the issue is that obd 1 and 2 don’t work on my car and i can’t figure it out

 

[Noobz347]

Your car is OBD-1.

https://www.amazon.com/INNOVA-3145-Ford-Digital-Reader/dp/B000EW0KHW/ref=sr_1_6?crid=2H9LL2CFI2M3G&dib=eyJ2IjoiMSJ9.H8j8GUUmy-m3k31INdlJywo_a4Thzc7y2UAP3p-iTqN6AqmuEXmesymg36rmNCuKXXp9zAq8APlqLL1ZMhuVL02wWFfyrNnGLLnzlgS4LyRN4jBLKKXV4C23debusagSw76qswMdbOowXDBo-0_TW3wUtfPqih972WSfhjfys_m5OCvxdfZ3HuMLJRTVyhMXkY1NdbnjSrp5wgx_rw0e3IbeWqlgyNmr1-_5Z2a20-3ZZDjX8XlVvWcT2nFUTiIXoxvSlxWL9dcCPw4CI3_R44mlnB3w-Nk77_g9k_-4Wzs.I7mCn_OKmnEEbEa2rrc6KwmNs7h4ofhBdsFz9G-aGfo&dib_tag=se&keywords=obd1+scanner&qid=1792880273&sprefix=OBD1%2Caps%2C188&sr=8-6

You can use a cheapo scanner from Amazon or use the method below:

Electrical Thread 'How To Pull Codes From EEC-IV In 86- 95 5.0 Mustangs'

Jan 27, 2016

@Noobz347 - The code dump procedure isn't in the sticky - you may want to add it...



Dump the codes: Codes may be present even if the Check Engine Light (CEL) isn't on.

Dumping the computer diagnostic codes on 86-95 Mustangs

Revised 26-July-2011. Added need to make sure the clutch is pressed when dumping codes.

Codes may be present even if the check engine light hasn’t come on, so be sure to check for them.

Here's the way to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for...

• jrichker
• Replies: 12
• Forum: Fox 5.0 Mustang Tech

• 

 

[JD1964]

The cold air intake you installed may have disturbed the way the air flows through the MAF. Is there a bend in the tube right before the MAF?

 

[JK.]

The cold air intake you installed may have disturbed the way the air flows through the MAF. Is there a bend in the tube right before the MAF?

no there isn’t there is one right as it comes off the air filter tho

 

[JK.]

Your car is OBD-1.

https://www.amazon.com/INNOVA-3145-Ford-Digital-Reader/dp/B000EW0KHW/ref=sr_1_6?crid=2H9LL2CFI2M3G&dib=eyJ2IjoiMSJ9.H8j8GUUmy-m3k31INdlJywo_a4Thzc7y2UAP3p-iTqN6AqmuEXmesymg36rmNCuKXXp9zAq8APlqLL1ZMhuVL02wWFfyrNnGLLnzlgS4LyRN4jBLKKXV4C23debusagSw76qswMdbOowXDBo-0_TW3wUtfPqih972WSfhjfys_m5OCvxdfZ3HuMLJRTVyhMXkY1NdbnjSrp5wgx_rw0e3IbeWqlgyNmr1-_5Z2a20-3ZZDjX8XlVvWcT2nFUTiIXoxvSlxWL9dcCPw4CI3_R44mlnB3w-Nk77_g9k_-4Wzs.I7mCn_OKmnEEbEa2rrc6KwmNs7h4ofhBdsFz9G-aGfo&dib_tag=se&keywords=obd1+scanner&qid=1792880273&sprefix=OBD1%2Caps%2C188&sr=8-6

You can use a cheapo scanner from Amazon or use the method below:

Electrical Thread 'How To Pull Codes From EEC-IV In 86- 95 5.0 Mustangs'

Jan 27, 2016

@Noobz347 - The code dump procedure isn't in the sticky - you may want to add it...



Dump the codes: Codes may be present even if the Check Engine Light (CEL) isn't on.

Dumping the computer diagnostic codes on 86-95 Mustangs

Revised 26-July-2011. Added need to make sure the clutch is pressed when dumping codes.

Codes may be present even if the check engine light hasn’t come on, so be sure to check for them.

Here's the way to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for...

• jrichker
• Replies: 12
• Forum: Fox 5.0 Mustang Tech

• 

i actually already own that obd reader and the obd one doesn’t get anything to it

 

[JD1964]

Sometimes if you rotate the MAF to a different position it helps. Loosen the clamps that hold the tubing to the MAF. Rotate the MAF 90 degrees if you can and retighten the clamps. Give it a try and see.

 

[JK.]

Sometimes if you rotate the MAF to a different position it helps. Loosen the clamps that hold the tubing to the MAF. Rotate the MAF 90 degrees if you can and retighten the clamps. Give it a try and see.

the maf censor isn’t on clamps it’s on bolts so i’d have to loosen them and twist it but i’ll try it tmr and see what happens thank you

 

[JD1964]

If you can’t rotate the MAF, you can always put the factory air filter stuff back in and see if the problem goes away.

By the way, the factory setup is already a cold air setup. You probably gained nothing by removing it. Is the new filter exposed in the engine bay?

Also, changing to long tube heaters involves O2 sensor being further from its stock location and typically involves wiring extensions. How did all that go? Double check all of that and make sure wire connections and wire securing is good.

 

[Noobz347]

Wiring to the test connector and/or the EEC itself are then suspect.

Home - ECU Exchange

ECU Exchange specializes in the re-manufacturing and repair of engine control modules.

www.theecuexchange.com

 

[90sickfox]

If I were you I'd take the CAI off and go back stock to see if it clears up. The electrical problem you have needs to be sorted out though. Like stated turning the maf may help.

 

[JK.]

If you can’t rotate the MAF, you can always put the factory air filter stuff back in and see if the problem goes away.

By the way, the factory setup is already a cold air setup. You probably gained nothing by removing it. Is the new filter exposed in the engine bay?

Also, changing to long tube heaters involves O2 sensor being further from its stock location and typically involves wiring extensions. How did all that go? Double check all of that and make sure wire connections and wire securing is good.

i figured it out cylinder 4 is misfiring and im trying to figure it out its not the distributor cap or rotor cs i js replaced those and they dont look bad and i js replaced all the wires after this happened so idk why its doing it. i hope its not a bad cam or something cause i was hearing an intermentant clicking above cylinder 4

 

[JD1964]

i figured it out cylinder 4 is misfiring and im trying to figure it out its not the distributor cap or rotor cs i js replaced those and they dont look bad and i js replaced all the wires after this happened so idk why its doing it. i hope its not a bad cam or something cause i was hearing an intermentant clicking above cylinder 4

Just out of curiosity, how did you discover #4 misfiring. Is that cylinder not firing at all or is it randomly misfiring?

 

[General karthief]

On the obd connector, the 94-5 GT models have a scanner connector under the dash, that connection does not work, the obdl is by the right/passenger side at the back of the shock tower. Is that the one you're using?

 

[JK.]

Just out of curiosity, how did you discover #4 misfiring. Is that cylinder not firing at all or is it randomly misfiring?

well i knew it was misfiring js off by sound so i did the water bottle spray test and that one was a little hot but no where near the others so i checked the spark plug and changed the wires cause i already had new wires and it was still doing it

 

[JK.]

On the obd connector, the 94-5 GT models have a scanner connector under the dash, that connection does not work, the obdl is by the right/passenger side at the back of the shock tower. Is that the one you're using?

yes and it won’t read the car on or off

 

[JD1964]

If you’re sure that the spark plug for #4 is firing as it should, the next step in my recommendation would be a compression test.

 

[JK.]

If you’re sure that the spark plug for #4 is firing as it should, the next step in my recommendation would be a compression test.

okay i’ll do it after school and ill let yk what all the readings are

 

[rednotch]

yes and it won’t read the car on or off

Try the paper clip/ jumper wire method and reading the check engine light flashes, should be plenty of YouTube videos sh9wing how, if it still won't out put codes chances are high ecu needs repair or replacement. The obd2 port is present on 94-95 v8 cars but its not connected to anything so it won't out put any readings,it was there for the v6 models.