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These AMI engines have software updates that corrected these issues. I have replaced the throttle pedal on some and it corrected the problem. I would try and monitor this while in cruise control. This will eliminate the throttle pedal circuit. Also a slipping gear on the fuel pump will cause this issue. As mentioned earlier, I would update the EECU and the VECU to the latest and greatest software and datafiles. Also try switching the governor settings from min-max to all speed or visa versa. V

You are quite welcome

I used to run it up to operating temp and allowed it cool back down to room temp then retorqued the heads V

Adding any lubricant to the bolts will change the torque value. If the OEM does not mention adding anti seize or lubricants to the threads I would advise against it. JoJo said it correctly, clean bolts is all that is needed. V

My choice would be the 03 Ch613, simply because there are less things to worry about in terms of engine de-rates and exhaust emissions. 2003 was the last year of the ETECH engine and for the most part they had most of the bugs worked out of them. The comfort level of the CV713 is very nice along with CTP. The Aset AMI engine had a lot of power complaints and the MP7 had a lot of exhaust after treatment issues and injector cups, engine derate issues, injector harness issues and blah, blah, blah. It really comes down too, what will give you the best bang for your buck. Which vehicle is best suited for you and most reliable. As I said , my choice is the ETECH over the others for its simplicity and reliability. What do you think JoJo and F? V

Here is the bulletin released by Mack with all the changes SB210032 ETECH to CCRS Engine Changes.pdf

What year is the engine that is being sold and what year is the current engine in your truck? There are some slight changes that occurred (pre ccrs and ccrs engines). The fuel systems did change. Unit pumps are different (part# 313GC5230M) from this time frame because it was used with a new camshaft design. They are not interchangeable. V

Hi Green, The block is the same but the rest of the engine components may not be. Auxiliary shaft, oil pump, turbo and injectors to name a few. They updated these components and may not be interchangeable. V

This is what I was able to dig up. Hope this is correct. V Chassis ID ML582 2067 Model R7 (R773ST) Build date 07/01/1970 11GB3051P31 ENGINE ASSY,DETROIT DIESEL(8V-71NE)ENGINE ASSY,DETROIT DIESEL(8V-71NE)(REV S) SPECIFICATIONS: ENGINE SERIES: 8V-71NE MODEL: 7087-7044 HORSEPOWER: 242 AT 1950 R.P.M. MAX. TORQUE LB.FT.: 690 AT 1200 R.P.M. BORE & STROKE: 4-1/4 X 5 DISPLACEMENT: 568 CU. IN.

Good call JoJo, It changes the throttle response. I was reading through this post and it seems that everything was thrown at this lazy dog. One thing I do remember was there was an engine data file available for this condition. We had a roll off come for the same exact problem. We had the Mack DSM involved in this because we were just chasing our tails. Everything seems fine (boost, fuel and the such). It was very lazy getting to speed when loaded especially when the fuel was hot. So we added a heat exchanger to the fuel system on the charge side to help increase fuel density. This helped a bit. There is a "special" Data File that Mack has to correct low power complaints on the AI engines, the problem is that the opacity was very high from the exhaust. We had customers ticketed for this, but the low power problem was corrected. Sorry I cant remember the P variant for the engine datafile. I am not sure if the following will help out and I cant remember if this was on the later etechs or the earlier asets. Maybe JoJo or F can help out with this. What we found was the air filter restriction gauge was always reading in the red with a new air filter with a quick road test. If you take a look on the under side of the hood. does it have a provision for another opening for an air cleaner? Also does it have a big air cleaner with an aluminium down pipe that removes dirt from the air cleaner? If it does there is a correction for this condition. What we did was we sealed off the existing hole with an aluminium plate and epoxy and riveted it in place. We cut out the provisioned hole and installed a new air cleaner assembly that was used on the CL with a Cummins ISX. This worked out okay because there was less restriction on the air intake. Customers were very happy with it. Cant think of anything else. V

Comes in a red tube if I remember correctly.

You are so right JoJo. Impact is such a disaster. I loved using EIS before it changed.

Be on the lookout for a white paint mark on a crank journal. That means that journal was undercut by .002" from the factory.

The engine kit will usually supply the RTV.

Could be. It would be interesting if he/she can take a snapshot of some live data and we can see whats happening. EGR data, injector data, and codes. But I think do the easy checks first would rule a lot out. V

Hi Bdschafer. How did the one shop come to the conclusion that the engine ECM was defective and another shop said the ABS module was defective? Did they explain a diagnostic process to come to that conclusion? There is an old saying in our industry, keep it simple stupid. I am a firm believer that the simple things should be ruled out first. Even though people here did not experience the same situation, others may guide you to help in a diagnostic process. Was the fuel pressure checked during the problem and after it cleared up? Was the cooling system checked for combustion gases? When you say it wont run right, does is sputter and miss while trying to accelerate? That could be an egr valve stuck open. The engine ECU will not command the egr valve to turn on until the coolant temp reaches 150 degf. Can you hook up a service tool and check for egr mass flow and egr temp? Any codes? Is it pushing coolant out of the coolant tank? If you can report back with some clearer information this will help. I'd hate to fire a parts cannon at the truck. There are a lot of smart people here that will collaborate and help you out. V

I have retrofitted Etech engines but never E7 mechanical. You are better off not even pursuing this endeavor because you will be very disappointed. Those engine brakes did not do much in engine braking. If you plan on doing this, i would like to hear back on the braking performance. V

I have rebuilt these boxes because of the the sector shaft leaking. In the end it's not worth it. After replacing the sector shaft and resealing the box add labor it doesn't make sense. If the inputshaft has a groove, then the box is toast. Sorry, i wish I had another idea, but as JOJO said it, you are better off with another box.

I had fixed a truck with the same correction as Jojo. It had the wrong boost pressure sensor. As F mentioned, you have to check fuel pressure first then take it from there.

I was thinking about this, and the only thing that I could come up with is the amount of time that the turbocharger would need to pressurize the intake. If the egr cross over tubes is not blocked off (blocking it off at the mixing chamber) then more time would be required to pressurize the intake. But that would be it. V

Glad we could help. V

I was able to dig up info. Measure the sensor depth using a nut, bolt and washer. remove the sensor(s). Screw the bolt in until it contacts the cam gear and the ring gear. Measure the bolt length. Here are the specs. The "P" numbers are the shims thickness in thousands of an inch. P30 =0.030". Too close or too far the sensor will not read correctly. Less than/equal to 1.328 (2) P30 1.329 through 1.343 (1) P15 + (1) P30 1.344 through 1.358 (1) P30 1.359 through 1.373 (1) P15 Equal to/greater than 1.374 None V

Good call. 3-2 or a 3-4. Engine rpm and cam position sensors respectfully. Power reset without key switch. Can be either of these. Also that model year had a bad problem with coolant wicking from the coolant overflow bottle. Coolant would wick through the coolant level sensor and into the engine ecu. Hopefully it a simple fix. V

Hello PlayingHooky13, When you turn the key in the on position does the dash light up? Is the malfunction indicator on (lightning bolt) on the dash? If it is, you can retreive the code by turning off the cruise control switch and press the set/resume switch down. It will give you a blink code. If it does let us know what the code is. If not, then it could be several things. Without spraying quick start, when you crank the engine over do the dash lights flicker on and off quickly? If it does it may be the battery voltage is too low for the engine ecu to get powered up, it requires I believe 9.5V to stay awake (if I remember correctly). This could be caused by defective batteries, too high of a voltage drop across the battery terminals (maximum voltage drop across the staring circuit on the positive side is 0.5V and the same on the negative side), or simply the starter motor has high internal resistance causing the battery voltage to drop below the ECU's threshold. Try cleaning all the battery connections and the starter connections. See if the problem persists. There is also a ground cable that is on the left side frame rail and it goes to the left of the engine block. Remove it and clean all the negative terminals. It doesn't sound like a fuel issue you have because it runs fine after it starts. But something to think about. It could also be the fuel pump. Did your vehicle have the fuel filter part of the fuel pump assembly and it has a plate to block off where the fuel filter lived? I have seen these pumps fail more often than the pumps without the filter. Fuel would bleed back to the tank and cause the same condition you are describing. The gear teeth in the fuel pump would wear out and instead of fuel being trapped in the pump it would pass the gear teeth. Use the hand primer and see if it starts more easily. If it does then it could be the pump. Do you have any diagnostic equipment fuel pressure gauges and a multimeter? I hate to see you throw parts at it and not fix the problem. Its time consuming and can get expensive. I think this will help somewhat. Let us know what you find. V

I attend the truck show every year at the international center by the airport.