New timing belt and no power

[TetonLC]

Okay, so I changed my timing belt and water pump. Took the LC to a mechanic for this, so I did not perform this myself.

The first thing I noticed was loss of top end power. She struggles to pass now and roars like never before to climb the pass.

I took the vehicle back to the shop complaining about this. They brought it in to look at the timing belt made sure that is lined up on the properties check the idol and whatever else they do when someone complains about timing belt being off I guess…

They said that everything was perfect, that all things were spot on.

So I thought to myself maybe the computer needs to reset, so I took it for a Drive… Hundred and 50 mile drive. Still no change.

Any thoughts on this? Whatever help or device might be able to is give much appreciated

I'm using the voice dictation to post this as Drive, so hopefully it doesn't come out to butchered

 

[BamaHeel]

maybe notches weren't aligned and timing off? seems like they would have seen it if they actually looked at it.

 

[OregonLC]

If that were the case it should be throwing misfire codes.

What is your fuel economy doing?

When you say 'roaring' is it fan noise? Perhaps they broke the fan clutch and it's not disengaging.

 

[2001LC]

Possible electronic issue: cam sensor, MAS connection…..is check engine light on?

 

[TetonLC]

No CEL. No misfire. Just big lack of power. Everything else is just fine

 

[TetonLC]

Fuel economy is down but as I love in the mountains the truck is working harder w/o the power

 

[2000UZJ]

I'm betting they did not route the cam sensor harness properly and the serpentine belt cut it. Is your oil pressure gauge working properly?

 

[SanDiegoCruiser]

Did they replace your starter at all? When my starter was replaced, they bumped the knock sensor harness and my truck had 50% power... But the CEL light came on.

 

[SWUtah]

Assuming your using a small shop. Sounds like they are not standing behind their work. Take them for a ride, tell them they screwed you truck up and you want it fixed.

 

[Norcalfamily]

It happened to me. Off a tooth or teeth.

 

[BackToTheBog]

The valve timing on my '98 recently was off by two teeth on one cam. There was serious rough idling, but it was less noticeable at higher speeds. The OBD threw flashing codes immediately. Your valve timing might be fine, but, as others have mentioned above, there might be sensors which were not re-installed or damaged during the job. I'd remove the skid plate and look for unplugged connections or interference with belts. If you find anything, you might want to repay the shop a visit and ask them to explain.

 

[SupraTuRD]

I'd bet they missed a tooth... my guess would be a tooth retarded at the crank.

 

[2001LC]

He said shop re-checked, possible if they are really bad mechanics.

 

[TetonLC]

I'm thinking its a tooth as well. Shop did recheck but only took them 20 mins so in assuming they didn't really do anything but check idle and the like

 

[2001LC]

I'm thinking its a tooth as well. Shop did recheck but only took them 20 mins so in assuming they didn't really do anything but check idle and the like

20 mins from time you handed keys they did nothing, 20 mins hands on is different. Call them and ask what and how they checked. Given then one more chance, if no go take elsewhere. You have rights....

 

[KuroCruiser]

20 minutes doesn't seem like enough time to actually check the belt alignment. You have to pull quite a bit off to see all 3 marks clearly, especially the crank timing mark.

I'd guess that they but the belt on backwards. I did that when I changed my timing belt for the first time and while it looked like everything was lined up, it was actually off by two teeth. I didn't get an error code for over a week after I finished, but power was effected and the engine sounded different. Once I finally got a cam alignment error I pulled it apart again and found my mistake.

The L-Cam mark goes on the right side of the engine and the R-Cam goes on the left if standing in front of the truck facing the engine, so it's easy to get it backwards.

 

[SWUtah]

20 minutes doesn't seem like enough time to actually check the belt alignment. You have to pull quite a bit off to see all 3 marks clearly, especially the crank timing mark.

I'd guess that they but the belt on backwards. I did that when I changed my timing belt for the first time and while it looked like everything was lined up, it was actually off by two teeth. I didn't get an error code for over a week after I finished, but power was effected and the engine sounded different. Once I finally got a cam alignment error I pulled it apart again and found my mistake.

The L-Cam mark goes on the right side of the engine and the R-Cam goes on the left if standing in front of the truck facing the engine, so it's easy to get it backwards.

I bet your right!!

 

[2001LC]

The harmonic balancer is keyed, so no need to expose lower end.

 

[TetonLC]

Okay, so I have had them check my timing belt twice now. The second time, they even brought me back into the shop to see exactly what they were doing.

Both times, they told me that the teeth lineup perfectly.

This second time the mechanic actually drove my truck more than just a couple miles around town. In fact, this time he went up and over Teton Pass.

When he came back he admitted that he could definitely see exactly what I was talking about in regards to the loss of power. However, he has absolutely no idea what it might be.

Once again I'm told that I need to bring the truck back into the shop for a scheduled appointment so that they can start going over it.

Absolutely none of this was a problem before the timing belt was changed.

Within the first five minutes of driving the cruiser, After the timing belt change I could see a big difference power.

 

[OregonLC]

Major vacuum leak or obstruction in intake? Like a shop rag?