Reman’d Jasper engine.

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Gerb15

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Jasper hemi 5.7
I just started driving my MDS delete Jasper reman. Maybe 50 miles on it now. Put it in my 2013 RAM 1500. $11k out the door. Seems to have less throttle power than the original engine that had a misfire in cyl 3. Also, it’s only averaging 9-10 miles/gallon compared to 13-14 in the original engine. I figured i’d have better mileage and power with the Jasper reman but so far it doesn’t seem that way. Any thoughts? Engine seems to run great though.
 

Daw14

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I have no direct use with them, however I’ve heard lots have had really bad experiences . For that much money you should have investigated MMX.m
 

Burla

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11 grand put that right back to the place that "fixed" it, the mis installed something internal my guess. Rods are known install issue. Pushrods not connecting rods.
 

Burla

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This is why, put a small rod into a large rod hole, there ya go. Bent pushrods on hemi rebuilds has to be the number one cause of misfires that I have heard on this board, could be something else, but could be this for sure. If it is a pushron on number 3, you can be causing damage the more you drive it.

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Rlaf75

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Im a fleet mechanice and we use jasper reman engines, transmissions and differentials on the company vehicles and I will honestly say that I will NEVER use a jasper product in anything that I personally own. I'm sorry you're having trouble but for that kind of money I would take it back immediately to the place that you gave $11k to and tell them to deal with it. I can tell you many not so good first hand stories about jasper products. My jasper rep lfinally left them because of the shady stuff he's seen. Get it back to the repair shop and let them deal with it. Good luck
 

Burla

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Seems to have less throttle power than the original engine that had a misfire in cyl 3. Also, it’s only averaging 9-10 miles/gallon compared to 13-14 in the original engine.


Engine seems to run great though.

Like, huh? Did two different people write your post? :)

There is what you want it to be and what it is. It is inconvenient but your engine isnt running great.

You shouldnt drive your truck til it is fixed, sorry for your troubles.

Here... Common bent pushrod symptoms and causes, it also jives with the low mileage.

7. A Bad Installation​

One of the most prevalent reasons for bent pushrods is improper installation. One way is by not tightening the rocker’s arms down enough. The pushrods may be subjected to excessive force and flex if the rocker’s arms are not correctly torqued down.

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buckeyexx

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Am I missing something or reading wrong? Why the assumption of bent push rods? What I am reading is the fact it just feels like it has less power than the original motor and poor fuel mileage. Maybe I missed something but said he had a misfire on cylinder 3 in the original motor not this new one. Not saying something isn’t right since it has less power but I think you would hear if it had bent pushrod. I didn’t read that anywhere.
 

Burla

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Am I missing something or reading wrong? Why the assumption of bent push rods? What I am reading is the fact it just feels like it has less power than the original motor and poor fuel mileage. Maybe I missed something but said he had a misfire on cylinder 3 in the original motor not this new one. Not saying something isn’t right since it has less power but I think you would hear if it had bent pushrod. I didn’t read that anywhere.
I stand corrected, I misread thought the mis fire was new engine. Not sure why even mention that since that engine is long gone, but yes indeed I should have reads that better.
 

jws123

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I would hook it up to a good scantool aswell as check compression i feel bad you spent 11k thats waaaay to much for a motor and for a truck work about that.. Another thought you said MDS deleted engine did you tune the truck? you would have to if its deleted.
 
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Gerb15

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Yeah, sorry. The misfire was on the prior stock engine. The new engine doesn't have a single issue with it other than it feels like it throttles slower, and gas mileage is horrible. I do find myself shifting to a higher gear on the gear shift which lowers the RPM increasing the mpg. I question if I have more power with the MDS delete on it...
 
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Gerb15

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The reman'd engine came with a Diablosport tuner for the MDS delete.
 

Burn2k12Ram

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Should have warranty with it. Do yourself a favor do a UOA as that can tell if anything internally is wrong. Also do a compression test. If there is any issue then at least you have the warranty. So get the checks done last thing you want is it completely failing on you down the road.
 
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Gerb15

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It does come with a 3 year - 100,000 mile warranty. So at least I can hang my hat on that. Thanks!
 

A_mod_too_far

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I just started driving my MDS delete Jasper reman. Maybe 50 miles on it now. Put it in my 2013 RAM 1500. $11k out the door. Seems to have less throttle power than the original engine that had a misfire in cyl 3. Also, it’s only averaging 9-10 miles/gallon compared to 13-14 in the original engine. I figured i’d have better mileage and power with the Jasper reman but so far it doesn’t seem that way. Any thoughts? Engine seems to run great though.

you have mds delete and wondering why mpg lower?
I'm not sure but arent jasper engines 2nd gen hemi? Thought that they dont use the eagle heads so makes sense they wouldn't have as much power
 

jws123

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you have mds delete and wondering why mpg lower?
I'm not sure but arent jasper engines 2nd gen hemi? Thought that they dont use the eagle heads so makes sense they wouldn't have as much power
Mds never saves any gas actually I got less mileage before i shut it off 13-15 without mds is normal so if hes getting 9-10 thats a bit odd.
 

Dodge 1500 4X4

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Just do the break in procedure jasper gives you by changing the oil at a certain milage, are you sure you are understanding the function of the tuner and MDS is for sure turned off in the PCM?
 

dhay13

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Yeah I have never seen much difference with MDS or without. Not enough to notice at least.
I used to build race engines and have never had experience with Jasper stuff but have heard lots of negative about them. I'm reluctant to let anyone build an engine for me but no way would I ever trust Jasper
 

A_mod_too_far

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Mds never saves any gas actually I got less mileage before i shut it off 13-15 without mds is normal so if hes getting 9-10 thats a bit odd.
It depends what kind of driving and how you drive, but it's sort of ridiculous to imply that mds does nothing or even reduces mpg, I mean how do you expect anyone to take that statement seriously...
 
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