hey fellow bronco owners have a 94 bronco 150xxx and the problem i am having is when moving from a dead stop the front end or engine shake really bad until you reach about 5mph and the same thing happens when coming to a full stop.i recently did a full tune up and i also upgraded the plugs,dist cap ignition coil but the spark plugs remains motorcraft.someone said the plugs could be bad and another said might be the converter.do i need to upgrade the plugs or is it somrthing worse.thanks
front end shaking
- Thread starter darknite
- Start date
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95EB Bronco
New member
Might be something wrong with first gear in your transmission but thats just my guess.
yo,
EZiest checks first;
Misfiring/Pinging due to Improper Spark Plug Wire Routing for 5.0; 94-96 5.0, Caused by Crossfire between Spark Plug Wires - INCLUDES 5.8
Diagram for 94-96 5.0 **
Source: by Ford via Ian L (stangmata, stangmata50l, Bronco) at SuperMotors.net
same as on your radiator top
94-96 5.0 & all 5.[/b]8 - engine miss, spark knock, buck/***** surge and other driveability concerns "]Spark Plug Wire Routing & Firing Order TSB 94-04-10 for 87-93 5.0 & 94-96 5.0 & all 5.8 - engine miss, spark knock, buck/***** surge and other driveability concerns Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
"ISSUE: Engine miss, spark knock, buck/***** surge and other driveability concerns may be caused by induction crossfire. This occurs because of improperly routed spark plug wires.
ACTION: If spark plug replacement is performed, the correct firing order and spark plug wire routing is essential to prevent the possibility of induction crossfire between cylinders. Refer to the following procedures for inspection of the spark plug wire routing and firing order. Properly reroute the spark plug wires if required.
Whenever a high-tension ignition wire is removed from a spark plug, the distributor cap, or the coil to perform a maintenance operation, Silicone Dielectric Compound must be applied to the boot before reconnection. Using a small clean screwdriver, apply a thin layer of Silicone Dielectric Compound on the entire interior surface of the boot. Do not apply compound to metal terminals.
FIRING ORDER
The firing order for 1987-1993 5.0Ls is 1-5-4-2-6-3-7-8. If #7 and #8, or #2 and #4 spark plug wires are routed next to each other at the separation bracket, an induction crossfire condition can occur.
The firing order for 1994-96 5.0Ls & all 5.8Ls is 1-3-7-2-6-5-4-8. On these vehicles the #1 and #3, or #5 and #6 spark plug wires must be separated to eliminate the possibility of an induction crossfire.
To eliminate the possibility of the coil wire becoming disconnected, route the coil wire under the spark plug wires at the distributor cap."
--------+++++++++++++++++++++++++
Torque Converter Operation Test
at 40mph in 2, OD OFF, and OD, or c) at the same RPM in every gear, or d) coasting, cruising, or in R, or e) during extended light braking, then it is NOT TC clutch shudder;
This test verifies that the torque converter clutch control system and the torque converter are operating correctly.
1. Carry out Quick Test with scan tool. For additional information, refer to the Powertrain Control/Emissions Diagnosis manual (PCED). Check for DTCs. MIESK5 NOTE; TRY THIS a Self Test by BroncoJoe19 do the KOEO = Key On Engine Off portion first & Remember to have engine @ Normal Operating Temperature before doing the KEY ON ENGINE RUNNING (KOER) portion[/b]
2. Connect a tachometer to the engine.
3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in (D) position.
4. After normal operating temperature is reached, maintain a constant vehicle speed of about 80 km/h (50 mph) and tap brake pedal with the left foot.
5. Engine rpm should increase when brake pedal is tapped, and decrease about five seconds after pedal is released. If this does not occur, see torque converter operation concerns. For additional information, refer to "Diagnosis by Symptom" in this section.
6. If the vehicle stalls in (D) or manual 2 at idle with vehicle at a stop, move the transmission range selector lever to manual 1 position. If the vehicle stalls, see torque converter operation concerns. For additional information, refer to �Diagnosis by Symptom� in this section. If the vehicle does not stall in (D), refer to "Diagnosis by Symptom" in this section.
7. If the vehicle exhibits a vibration during the road test complete the Road Test Evaluation Form. This form will aid the technician in determining the source of the vibration. MIESK5 NOTE; Here it is; http://www.supermotors.net/registry/media/700123_1Noise, Vibration, & Harshness Diagnostic Location Diagram & Worksheet Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
The following is a list of common vehicle concerns that have been misdiagnosed as torque converter clutch shudder. For diagnosis of the following items, refer to the appropriate sections of the workshop manual and the Powertrain Control/Emissions Diagnosis manual (PCED).
Spark plugs - check for cracks, high resistance or broken insulators.
Plug wires.
Fuel injector - filter may be plugged.
Fuel contamination - engine runs poorly.
EGR valve - valve may let in too much exhaust gas and cause engine to run lean.
Vacuum leak - engine will not get correct air/fuel mixture.
MAP/MAF sensor - improper air/fuel mixture. HO2S sensor - too rich/lean air/fuel mixture. Fuel pressure - may be too low.
Engine mounts -loose/damaged mounts can cause vibration concerns.
Axle joints - check for vibration..." "]
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
======================
Tire speed related vibrations are caused by a component rotating the same speed as the tires that is out-of-round or out-of-balance Use it for a general diagnosis by vibratesoftware.com
For Example;
First order tire speed related vibrations cause one shake or disturbance for each revolution of the tire.
IMPORTANT: Anything that is out of balance will only cause a first order vibration, never any higher order vibrations.
NOTICE: The following items should be checked in the order shown.
First order tire speed related vibrations are usually caused by:
A tire or wheel that is out of round - Click here to measure tire and wheel runout
A tire or wheel that is out of balance - Click here to measure tire and wheel balance
A brake drum or rotor that is out of balance - Click here to check drum or rotor balance
An axle ****** or hub that is out of round - Click here to measure Axle and hub runout
Wheel stud circle runout - Click here to measure stud circle runout
Stiff spots in the tire's sidewall. (Force variation) - Click here to learn more.
Drive axle problems. Click here to diagnose.
EZiest checks first;
Misfiring/Pinging due to Improper Spark Plug Wire Routing for 5.0; 94-96 5.0, Caused by Crossfire between Spark Plug Wires - INCLUDES 5.8
Diagram for 94-96 5.0 **
Source: by Ford via Ian L (stangmata, stangmata50l, Bronco) at SuperMotors.net
same as on your radiator top
94-96 5.0 & all 5.[/b]8 - engine miss, spark knock, buck/***** surge and other driveability concerns "]Spark Plug Wire Routing & Firing Order TSB 94-04-10 for 87-93 5.0 & 94-96 5.0 & all 5.8 - engine miss, spark knock, buck/***** surge and other driveability concerns Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
"ISSUE: Engine miss, spark knock, buck/***** surge and other driveability concerns may be caused by induction crossfire. This occurs because of improperly routed spark plug wires.
ACTION: If spark plug replacement is performed, the correct firing order and spark plug wire routing is essential to prevent the possibility of induction crossfire between cylinders. Refer to the following procedures for inspection of the spark plug wire routing and firing order. Properly reroute the spark plug wires if required.
Whenever a high-tension ignition wire is removed from a spark plug, the distributor cap, or the coil to perform a maintenance operation, Silicone Dielectric Compound must be applied to the boot before reconnection. Using a small clean screwdriver, apply a thin layer of Silicone Dielectric Compound on the entire interior surface of the boot. Do not apply compound to metal terminals.
FIRING ORDER
The firing order for 1987-1993 5.0Ls is 1-5-4-2-6-3-7-8. If #7 and #8, or #2 and #4 spark plug wires are routed next to each other at the separation bracket, an induction crossfire condition can occur.
The firing order for 1994-96 5.0Ls & all 5.8Ls is 1-3-7-2-6-5-4-8. On these vehicles the #1 and #3, or #5 and #6 spark plug wires must be separated to eliminate the possibility of an induction crossfire.
To eliminate the possibility of the coil wire becoming disconnected, route the coil wire under the spark plug wires at the distributor cap."
--------+++++++++++++++++++++++++
Torque Converter Operation Test
at 40mph in 2, OD OFF, and OD, or c) at the same RPM in every gear, or d) coasting, cruising, or in R, or e) during extended light braking, then it is NOT TC clutch shudder;
This test verifies that the torque converter clutch control system and the torque converter are operating correctly.
1. Carry out Quick Test with scan tool. For additional information, refer to the Powertrain Control/Emissions Diagnosis manual (PCED). Check for DTCs. MIESK5 NOTE; TRY THIS a Self Test by BroncoJoe19 do the KOEO = Key On Engine Off portion first & Remember to have engine @ Normal Operating Temperature before doing the KEY ON ENGINE RUNNING (KOER) portion[/b]
2. Connect a tachometer to the engine.
3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in (D) position.
4. After normal operating temperature is reached, maintain a constant vehicle speed of about 80 km/h (50 mph) and tap brake pedal with the left foot.
5. Engine rpm should increase when brake pedal is tapped, and decrease about five seconds after pedal is released. If this does not occur, see torque converter operation concerns. For additional information, refer to "Diagnosis by Symptom" in this section.
6. If the vehicle stalls in (D) or manual 2 at idle with vehicle at a stop, move the transmission range selector lever to manual 1 position. If the vehicle stalls, see torque converter operation concerns. For additional information, refer to �Diagnosis by Symptom� in this section. If the vehicle does not stall in (D), refer to "Diagnosis by Symptom" in this section.
7. If the vehicle exhibits a vibration during the road test complete the Road Test Evaluation Form. This form will aid the technician in determining the source of the vibration. MIESK5 NOTE; Here it is; http://www.supermotors.net/registry/media/700123_1Noise, Vibration, & Harshness Diagnostic Location Diagram & Worksheet Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
The following is a list of common vehicle concerns that have been misdiagnosed as torque converter clutch shudder. For diagnosis of the following items, refer to the appropriate sections of the workshop manual and the Powertrain Control/Emissions Diagnosis manual (PCED).
Spark plugs - check for cracks, high resistance or broken insulators.
Plug wires.
Fuel injector - filter may be plugged.
Fuel contamination - engine runs poorly.
EGR valve - valve may let in too much exhaust gas and cause engine to run lean.
Vacuum leak - engine will not get correct air/fuel mixture.
MAP/MAF sensor - improper air/fuel mixture. HO2S sensor - too rich/lean air/fuel mixture. Fuel pressure - may be too low.
Engine mounts -loose/damaged mounts can cause vibration concerns.
Axle joints - check for vibration..." "]
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
======================
Tire speed related vibrations are caused by a component rotating the same speed as the tires that is out-of-round or out-of-balance Use it for a general diagnosis by vibratesoftware.com
For Example;
First order tire speed related vibrations cause one shake or disturbance for each revolution of the tire.
IMPORTANT: Anything that is out of balance will only cause a first order vibration, never any higher order vibrations.
NOTICE: The following items should be checked in the order shown.
First order tire speed related vibrations are usually caused by:
A tire or wheel that is out of round - Click here to measure tire and wheel runout
A tire or wheel that is out of balance - Click here to measure tire and wheel balance
A brake drum or rotor that is out of balance - Click here to check drum or rotor balance
An axle ****** or hub that is out of round - Click here to measure Axle and hub runout
Wheel stud circle runout - Click here to measure stud circle runout
Stiff spots in the tire's sidewall. (Force variation) - Click here to learn more.
Drive axle problems. Click here to diagnose.
miesk5 thanks for all the info i did check for any misfire but there was none i really only have 2 good tires and 1 is really bald.i have bfg mudd tires and they are so damn expensive just saving up to replace all 4.i will try and go through the list and see what happens.the turkey will have to wait this week.
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