The BEGi MazdaSpeed Miata
EGR Boost Sensor Solenoid Fix
Installation and Operations Manual
Applicable to all 2004 to 2005 MazdaSpeed Miatas
Revised 4-14-14
Rev 1.1
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Thank you for purchasing the MazdaSpeed Miata EGR Boost Sensor Solenoid Fix Kit. We regard your installation
as a mutual project and will be pleased to offer help at any time. If clarification of these instructions is required,
please call BEGi at 830-438-2890. Suggestions for improvements of these instructions are welcome. Send an e-mail
to [email protected]. Or, write notes on the instruction set and mail to: BEGi, 203 Kestrel Dr., Spring
Branch, Texas. 78070.
The success of this installation will be determined by a variety of factors. These instructions should be adhered to
at all times. The vehicle must be in excellent condition and proper tune prior to starting the installation.
It is not necessary that the installer has any previous experience with forced induction. All left or right directional
references will be from the driver viewpoint. For example, the turbo mounts on the left side.
Please read the statement of warranty at the end of these instructions prior to starting the installation. The installer
should pass these instructions on to the owner-driver.
Tool and Equipment Requirements
The following tools and equipment will be required to conveniently accomplish this install:
Wire Cutters
Needle Nose Pliers
Wire Crimpers
Heat Gun
Preliminary
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The car needs to be in good working order prior to modification.
Disconnect the Negative terminal on the battery. The battery is located in the trunk, on the right side.
Save all fasteners and clamps as they will be reused to install the new valve.
Re-gap the Spark Plugs to 0.028 to 0.035.
Removing the Stock Valve
The stock EGR Boost Sensor Valve is located on the passenger side of the engine bay, at the left side of the strut
tower bar under the zinc plated support bracket. Refer to picture # 1 & 2.
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Picture # 1
Picture # 2
Locate the two vacuum lines and electrical harness attached to
the valve. Disconnect the wire harness and set aside for now.
Refer to picture # 1 & 2.
It is important to keep the valve in the appropriate direction. The
vacuum port on the side of the valve next to the “ASCA” letters
is the “IN” port. The opposite side is the “OUT” port. See
picture # 3 for the labeled side of he valve and the inlet and
outlet marked.
Remove the OEM valve and replace with the new valve, in the
correct direction. The “IN” line will connect to the vacuum line
that goes to the front part of the intake manifold. Use the needle
nose pliers to loosen the OEM pinch clamps and move them
over. Replace the vacuum line on the IN side first by pushing
the hose onto the hose barb on the IN side of the valve. Use the
pliers to place the pinch clamp into position over the hose barb.
Repeat the same process for the OUT vacuum line. The
electrical wires will be pointing towards the engine. Refer to
picture # 3 & 4.
© Copyright BEGi 2011-2015.
Picture # 3
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Picture # 4
Locate the Adel Clamp in the parts bag. Wrap it around the
valve and line up the holes with the OEM screw. Remove the
screw and secure the clamp under the screw. Tighten the screw.
Refer to picture # 5.
Locate the wires and run them underneath the brackets back
towards the fender well. All of the electrical wiring has been
pre-assembled except to replace the OEM connector. Remove
the OEM connector by cutting the wires 1" from the connector.
That way if it ever needs to be returned to stock there is enough
wire length to do so. After cutting off the connector, strip the
Picture # 5
end of the wire to expose the strands. Push on the piece of heat
shrink onto each wire. Crimp on the new solenoid wires with
the butt connectors already attached. Once secure, move the heat
shrink in place over the butt connector. Use the heat gun to
shrink the heat shrink. Secure the wire connectors out of the way
where they cannot be knocked loose or frayed. Refer to picture
#6. (Note the location of the secured connector, the electrical
connection will be done differently though)
Picture # 6
© Copyright BEGi 2011-2015.
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General Rules of Operation
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Do not apply maximum boost for more than 30 second durations.
Always re-gap the spark plugs down to 0.028 to 0.035. Change the spark plugs yearly.
If any sounds of rough combustion/detonation/engine knock occur, cease using boost until the cause is
identified and corrected.
It is the responsibility of the installer to review these general rules of operation with the owner/driver.
If the car stalls and loses power, please call BEGi immediately.
Do not raise the boost without confirmation that the car has adequate fuel when under boost.
Warranty Information
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If problems arise from using a BEGi part in a manner other than intended, a part is installed incorrectly,
or additional parts are install that the tune is not configured for - BEGi reserves the right to refuse
warranty coverage for damages.
BEGi reserves the right to inspect any item before any warranty will be granted. BEGi will not reimburse
for any labor charges on warranty items that occur.
BEGi extends no warranty nor accepts liability to any original, stock, or replacement components on the
vehicle.
Terms of Sale
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All shortages from the parts list must be reported to BEGi within 14 days of receipt.
BEGi does not pay any towing expenses.
All returned items are subject to a 25% re-stocking fee.
BEGi accepts no liability for death or injury to any person or persons under any circumstance.
The re-seller assumes all responsibility for the end user’s knowledge of this warranty.
Acceptance, re-sell, or use of any BEGi part constitutes full agreement by the re-seller/end user, that the
terms of sale and warranty are fully understood and accepted in full.
BEGi will not pay your speeding tickets. ☺
© Copyright BEGi 2011-2014.
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