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Sold by: Tooldom Tools
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(3042 ratings)
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OTC 6550PRO Professional Master Fuel Injection Service Kit

4.4 4.4 out of 5 stars 130 ratings

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Brand OTC
Item Dimensions LxWxH 15 x 12 x 4 inches
Item Weight 0.6 Pounds

About this item

  • Perform fuel pressure testing diagnose weak fuel pumps or restricted filters test for fuel flow and perform leak-down tests
  • 0-100 pounds per square inch fuel pressure Gauge
  • 47 OTC fuel injection system adapters each with a quick connect Schrader Valve
  • 1997-2008 fuel injection service application manual
  • Replacement seal kit
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$735.02
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OTC 6550PRO Professional Master Fuel Injection Service Kit
OTC 6550PRO Professional Master Fuel Injection Service Kit
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Price$735.02$70.99-42% $326.34
List:$559.95
$121.99$49.46
Delivery
Get it Mar 25 - 26
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Customer Ratings
Accuracy
5.0
4.2
4.5
4.4
Value for money
4.4
4.1
4.2
Easy to read
4.2
3.2
4.5
Sold By
Tooldom Tools
LainKeen
Amazon.com
Amazon.com
Amazon.com
material
Rubber
Rubber
Rubber, Brass
weight
0.6 pounds
0.1 pounds
2.22 grams
1 grams

From the manufacturer

OTC Otawonna Tools Equipment HD Specialty Service Professional Technician Diagnostic
OTC A Proud Heritage Since 1925 Quality Tools and Equipment Professional Service Specialty Tool

Proud Heritage of Manufacturing Quality Tools and Equipment
Steve Cross

Drop Forge Operator of 40 years

“I’M PROUD OF THE OTC BRAND. I’M MAKING A BRAND THAT’S BEEN AROUND A LONG TIME. ANY GUY THAT’S WORKED ON A CAR HAS HEARD OF THE OTC BRAND, AND THEY PROBABLY HAVE USED IT.”

At OTC, we're proud of our heritage and those that have built it with us.

OTC - Proudly Serving Professional Technicians for Almost a Century

What We Like Most About Technicians is Their Work Ethic

Technicians are problem solvers who aren’t afraid of sweat on their brow and grease on their hands. They provide high quality services that demand high quality tools. When they need a reliable tool, they know they can depend on OTC tools to deliver.

Owatonna Tool Company for the long haul — proudly designing and manufacturing American specialty service tools, diagnostics and shop equipment since 1925.

  • Automotive Specialty Tools
  • Heavy Duty Truck Service Tools
  • Heavy Duty Shop Tools
  • Motorcycle Tools
  • Electronic Diagnostic Tools
  • and so much more
OTC Shop Equipment Power Train Lifts Stands Cranes Presses DPF Equipment
OTC Tools Special Service Tools automobiles car truck motorcycle
OTC Professional Diagnostics Encore Scan Tool

Product Description

This Professional Fuel Injection Master Fitting Kit from OTC puts a full coverage fuel system service kit in your toolbox and greater service opportunities in your shop. This kit from OTC comes with an analog fuel pressure gauge preferred by professional service technicians giving precise pressure readings as well as a view of pressure sweeps during the testing analysis. The pressure testing manifold is designed with a bypass valve letting the technician perform basic fuel flow assessments. The 6550PRO has more adapters than any other kit we’ve found giving the best coverage of any kit on the market. Domestic, Asian and European we’ve got ‘em. Each adapter works with schrader valve fittings to ensure user safety by preventing fuel spray when connecting or disconnecting the pressure gauge (included) the fuel line, or an accessory like a cleaning canister. All seals and o-rings in the 6550PRO from OTC are made with highly durable Viton material to prevent swelling or cracking when exposed to gasoline, alcohol blends and even the most aggressive injector cleaning chemicals. It comes with an application manual showing technical references for make/model/year, engine for vehicles produced between 1997 and 2008 inclusive. We include fuel Injection system, OE Fuel Pressure ranges, Fuel Pump Access point and disabling reference, OTC adapter reference and fuel line access locations for virtually full vehicle coverage.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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OTC 6550PRO Professional Master Fuel Injection Service Kit


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Customer reviews

4.4 out of 5 stars
4.4 out of 5
130 global ratings

Customers say

Customers like the quality, value, performance, and ease of use of the OTC6550 Pro Fuel Injector Testing Kit. They mention that the pieces are well made, the adapters are easy to use, and the guage is accurate and fine enough in the 0-10 psi range. They also appreciate the comprehensive manual that comes with it, which is a huge time saver. Overall, customers recommend this kit as an absolute necessity for any professional tech.

AI-generated from the text of customer reviews

42 customers mention42 positive0 negative

Customers are satisfied with the quality of the electromechanical gauge. They mention that the pieces are well made, and the connections have been tight with no leaks. The kit is complete and has everything they need.

"...The pieces are well made and connections have been tight with no leaks.This unit sells in many places for over $400...." Read more

"...All the fittings are well made, no leaks, the guage is large, accurate and fine enough in the 0-10 psi range that it still works well as a low..." Read more

"...OTC's quality for this kit is very good. Fittings are brass and valved. Quick disconnects are high quality too. The OTC 6550PRO is the way to go...." Read more

"Great set, very complete, This set appears high quality however one of the hoses fell off my bench and the quick connect sleeve bent enough that I..." Read more

27 customers mention23 positive4 negative

Customers are satisfied with the value of the electromechanical gauge. They say it's a great deal for the price, and well worth it. Some mention that the fittings are quality.

"...Great pricing through Amazon.com, I would buy it again in a second." Read more

"...I paid just under $300 and it was well worth it. The ONLY complaint I have is that there needs to be more early Porsche adapters for CIS systems...." Read more

"...Has all connectors that u need and half the price of strap on uhh I mean snap on. I would recommend buy otc tools anytime...." Read more

"I purchased this kit for my shop and it has been worth every penny...." Read more

10 customers mention7 positive3 negative

Customers like the performance of the electromechanical gauge. They mention that it works as expected, is easy to use, and has plenty of adapters. Some say that the guage is large, accurate, and fine enough in the 0-10 psi range.

"...update 5/27/2020. Still using this weekly and it is still working great. It has paid for itself many times over since purchasing it in 2013 for $281...." Read more

"...fittings are well made, no leaks, the guage is large, accurate and fine enough in the 0-10 psi range that it still works well as a low pressure..." Read more

"...This kit works perfectly with the injector cleaner canister, too." Read more

"...the line out then i can use it to get a flow reading but it doesn't work every time...." Read more

9 customers mention9 positive0 negative

Customers are satisfied with the manual that comes with the product. They mention that it is very comprehensive, and they like the application book.

"...The included book is very detailed with vehicle fuel system pressures through MY 2008...." Read more

"...Also, the reference book is super handy and a huge time saver! This kit works perfectly with the injector cleaner canister, too." Read more

"...The included book is also highly useful as it gives model specific tips for fuel pressure ranges as well as fuel pump disable method...." Read more

"...kit, commercial quality, best price around and even had the most updated application book which was not listed in the details." Read more

8 customers mention8 positive0 negative

Customers find the electromechanical gauge easy to use. They mention that the manual makes adapter use easy, and the hose whip adapter makes hookup on some applications so much easier. The book is super handy and a huge time saver, and it is an absolutely necessary tool.

"...adapter and a straight hose whip adapter, this makes hookup on some applications so much easier...." Read more

"...Also, the reference book is super handy and a huge time saver! This kit works perfectly with the injector cleaner canister, too." Read more

"...Quick easy and complete. With the guide it is easy to figure out what fitting for what car and it includes the specs." Read more

"...Parts are a high quality like all otc products are. The manual makes adapter use easy." Read more

4 customers mention4 positive0 negative

Customers are satisfied with the leakage of the electromechanical gauge. They mention that the fittings are well made, and the connections have been tight with no leaks.

"...The pieces are well made and connections have been tight with no leaks.This unit sells in many places for over $400...." Read more

"...All the fittings are well made, no leaks, the guage is large, accurate and fine enough in the 0-10 psi range that it still works well as a low..." Read more

"...No leaks and was easy to connect and disconnect." Read more

"...Read a few reviews and no problems with mine. No leaking pressure or anything. Going to buy the fuel cleaner tank to go with." Read more

3 customers mention3 positive0 negative

Customers like the connectivity of the product. They mention that the quick disconnects are high quality and it's easy to hook it up to a vehicle.

"...Fittings are brass and valved. Quick disconnects are high quality too. The OTC 6550PRO is the way to go. I wouldn't buy the smaller OTC kits...." Read more

"...Tried using this and was way easier with the quick disconnects and was able to hook it up to a 92 ford ranger...." Read more

"It's a great kit to have. Has the quick disconnect fuel lines I need an much more, I have recommended this set without hesitation." Read more

Well worth the price!!  You won't regret it
5 Stars
Well worth the price!! You won't regret it
This set has an unbelievable amount of adapters, and a book to tell you which adapters and what fuel pressure to expect. The different adapters have high quality quick disconnects. I have probably used this on 30 different cars, many different makes. It has always connected as expected with no leaks. The hose has a pressure relief hose, which is larger than on other fuel pressure gauges that I have seen. This larger hose can be handy when you need to empty a fuel tank, or get fuel out of a vehicle for a generator during a blackout.
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Top reviews from the United States

Reviewed in the United States on July 30, 2013
12 people found this helpful
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Reviewed in the United States on March 27, 2012
6 people found this helpful
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Top reviews from other countries

Ken Coner
5.0 out of 5 stars good product
Reviewed in Canada on September 11, 2021
Allan Einberg
5.0 out of 5 stars The kit is very complete, and the manual that ...
Reviewed in Canada on August 5, 2015
MG
5.0 out of 5 stars Five Stars
Reviewed in Canada on November 22, 2014
Peter D Zuk
5.0 out of 5 stars Five Stars
Reviewed in Canada on September 12, 2014