Had Cat 3126 ECM go bad. I ordered a replacement from 1EngineControl and emailed them my parameters to program. They sent it out very quickly and the ECM they sent is fine, but they did not program it like they said they would. Its not a difficult process. Granted, it would take some time to go line by line and input them. So Ill still have to take it to someone that can finish the programming. They offered to do it if I sent it back to them...no way am I taking that out and putting it back in. I know it would be more convenient for them, but definitely not for their customer (me). I am satisfied with the part they provided and their communication but they did not deliver what was sold to me, unfortunately.

Very professional. Just had a Rv go down and shipped out Cummins engine computer for testing. Same day replacement shipped out overnight. Runs better with the upgrade in programming for more horsepower tune.

They referbushed an Ecu for my Cat and very fast turnaround and reasonable rates thanks would highly recommend this place 100%

Drove by and saw online they had a Ecm repair service for caterpillar engines. My truck is 01 Kenworth with a 6NZ cat ecm that had injector issues. They told me they can also tune the ecm and now it runs better than ever. They have a small shop but you can see that they have 10-15 trucks waiting for service. Very great service. Recommended from Atlanta!!

They purchased a USED NON WORKING CORE via ebay from me. then decided to return the item to be for being not working. after being forced to accept the return via ebay the left me negative feedback and sent me a different item as a return and now im out 600 dollars and i have a junk return from them. these people are scam artists.

Fast fixing my 2007 Freightliner Ecm . Also removed the speed limit on the Detroit 5 Ecm . Thanks .

Great repairs on my Caterpillar Ecm . Also they upgraded my horse power from 475 C15 to 550 Hp tune with better Miles to the gallon. Thanks guys! Second Ecm I have repaired with them. The only thing that I did not like was that they shipped it to the wrong address and am not sure who was in fault . They had good communication and let me speak with a tech/agent that knew what he was talking about unlike some of the other places in dallas and grand prairie. I was down for a bit but the price was better than anyone eles in the USA and they provide a great warranty. I paid $200 extra for a lifetime warranty and still beats the other places that offer lifetime. If your looking for someone who knows their stuff on Caterpillar Ecm please use them they said they had 10 years plus working on Ecms.

I sent in my ECM for refurbishment. I paid $400 up front for the services. They inspected it and called me letting me know it was Non-repairable. They refunded me $250 as their policy is that if the unit is not repairable they retain $150 for the inspection. I knew Non-repairable was a possibility and was not surprised. I purchased a refurbished ECM from them for another $1011. My total paid was $1161. I installed the new ECM to find out my truck runs the exact same.There was nothing wrong with my ECM. It turned out I had different issues. Now I have 2 perfectly good working ECMs because they diagnosed mine as Non-repairable when they should have said We didnt find anything wrong with it.Their communication was decent and professional. They sent plenty of email updates as to what was going on. I was counting on them and they let me down. Now Ive spent almost $1200 when it should have been $150.It gets weird though. The ECM they had sent to me was from an outside source on Ebay. I understand plenty of legit businesses run through Ebay too but it just seemed werid that such a professional establishment would do that.It was tough making the choice for an ECM refurbishment company. Ive looked around a lot and many people seem to have 50/50 experiences with every single one of these companies. You can find dirt on almost any ECM company on the BBB website. All in all, Im glad I worked with 1Engine Control because I feel like anyone else would have been worse to deal with. Though I would never refer anyone to them. Unfortunately I feel like I still got tricked into spending another $1050 that I didnt have any reason to.

Got my part for my fleet of trucks. Great job on my caterpillar ecm for my semi truck. Thanks John. Good quality and worth the extra money from a used part.

Huge savings over CAT dealer! The ecm is working great and the bus is on the road every day. The only issue I had was with USPS. Thanks!

Sent my 6nz 3406 cat ecm for repairs and I just got it back and everything is working perfectly. Recommend!

Thank you for making it easy as it was my husbands first time replacing a Diesel Caterpillar ecm for our Sterling Truck. Highly recommended.

Fast Ecm Repair shipping after they told me my unit had oil damage inside. Bought one for $1500 for my kenworth truck cat ecm and installed and currently working great. Bummer that they could not repair mine for 619$. Will do business again due to the increase in horsepower.

I sent my Cat ECM from Australia to the USA for repair it was checked and quoted for repair around $700 US which i paid, received the unit back which I refitted to the engine and found to be faulty with the engine hunting and stalling with a voltage bleed in the ECU 12v down to 2 volts then back up to 12 nearly stalling, Juan suggested sending it back which i did and they had the same problem the ECU was sent back to me again i fitted it agin with no change?I have twin engines and both times I took the ECU off the second engine and fitted it to make sure it was definitely the ECU at fault and the engine ran fine !I was told my emails with questions had gone to spam after I received late replies with no answers now I cannot get any replies to my emails and am way out of pocket and have had no refund or response.RichardDarwin Australia

John was very helpful and answered my husbands questions for his peterbilt truck . We shipped our part for repair service for caterpillar engine computer . 2 days later we received a call that it was repaired and my husband truck is up and running making $$$. Thanks john . (Lifetime warranty)

Amazing customer service. Thanks for the replacement on my Cummins Ecm for my ISX freight-liner truck. I would come back for a custom tune. Awesome Job.

Awful!! They listed price of $1099 with core for a C15 ecm and it was supposedly in stock. I sent my ecm, and when they said it was not reparable, the price jumped to $1900. Their rep Juan Estrada said there was nothing they could do and insisted I pay $1900. bait and switch, pure and simple!!!

Fast repair service for my detroit engine computer. Thanks guys.

Repaired my Cat ecm for my pete. Highly Recommended. They also sell Caterpillar truck parts for exchange.

Worked with us to get us back on the road, and honored their warranty. Small shop but worked at it till they did right by us. Recommend.

Good prices on repair service. Ask for upgrade horsepower for $100 fee.

I tried another company in grand prairie and was running in circles for my Cat Ecm. Called here and they were able to fix my Cat Ecm. Upgrade my Horepower to 550Hp for my c15 truck. Thanks 1Enginecontrol. Happy customer.

Posting on behalf of my husband Jeff. He talked to John and he was very helpful. He did what he asked for. Got the new ECM in three days, changed it, and it worked. Thanks again.

Great customer service! got my caterpillar ecm rebuild! horsepower upgrade done. recommended to anybody..........

I ordered an Cat ecm for my Pete last November with a 1 year warranty and late October/early November the truck started losing ignition power to the ecm while driving. I replaced all wires power and ground to the ecm and it still is doing the same thing, it is the ecm itself and I have emailed and called these people every day and all I get it the secretary telling me she will send a message to the correct department meanwhile that year warranty is running out. It sucks because I need that ecm and it cost me money every time I have to return loads because the truck shut down in the middle of the road or highway.Finally was able to get in contact with a representative, they did indeed honor the warranty and are currently sending me a new ECM.

I OWN A FLEET OF TRUCKS AND SENT IN 3 TO BE REPAIRED. HAPPY CUSTOMER ALL TRUCKS RUN BETTER THAN BEFORE.

BUYER BEWARE. POOR CUSTOMER SERVICE NEVER RETURNED MY PHONE CALLS OR NO EMAIL REPLIES. TOOK THREE WEEKS TO GET PART AND IT DIDNT WORK. THEY WILL NOT GET AWAY WITH CONNING ME. DO NOT DO BUSINESS.

Great service.

Sent in my computer to them. Very professional. I was very satisfied. They will not disappoint.

Great work on rebuilding our Cummins ECM.

Satisfied with tune..will do business again

Purchased remanufactured computer for my Signature 600 CumminsIt failed with 1 Month of with hauling with it. I had to have a road service call by Rush Truck which cost me $800.00. They would warranty the computer but will not cover the cost of the service call.1 Engine Control will not stand behind there products. BEWARE

Great service and fast turn around. Delivered exactly as promised.

Very good item and good price

What I needed when I need it

Fast & Helpful