Intermittent Miss
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Junior User
Joined: Nov 2007
Posts: 89
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From: OR
Intermittent Miss
I’m beginning to notice what sounds like an intermittent miss. It sounds like one of the cylinders is weak but not consistently. Cold starts are easy with no smoke (replaced glow plugs, relay and repaired wire harness 4 months ago). I notice it most when cruising at freeway speeds with light throttle (probably because the engine noise doesn’t drown it out) especially on slight downhills. It may be missing on hard acceleration as well but so far it’s subtle enough that I don’t notice it as much.
I bought the truck new and most of its 160k miles are highway no load. I know this is a little early for the injectors to have problems but from what I’ve read here it sounds likely. This is not the CPS. I’m on my third CPS and pretty well know what that sound/feels like. This is much more subtle.
The CEL has never lit and I don’t have a scanner so I can’t say if any codes are stored.
I can’t afford shop rates so I’m wondering if there is a reasonably priced device that I could attach to my laptop to analyze this?
The only recent repair was a water pump that I replaced about two months ago. I also replaced the thermostat with a 205 at that time. The only other thing I need to sort out is a small fuel leak at the engine. Can I use the UV die same as thats added to AC to find leaks? I have a small bottle that is oil base.
<O
</O
Thanks, Joel.
I bought the truck new and most of its 160k miles are highway no load. I know this is a little early for the injectors to have problems but from what I’ve read here it sounds likely. This is not the CPS. I’m on my third CPS and pretty well know what that sound/feels like. This is much more subtle.
The CEL has never lit and I don’t have a scanner so I can’t say if any codes are stored.
I can’t afford shop rates so I’m wondering if there is a reasonably priced device that I could attach to my laptop to analyze this?
The only recent repair was a water pump that I replaced about two months ago. I also replaced the thermostat with a 205 at that time. The only other thing I need to sort out is a small fuel leak at the engine. Can I use the UV die same as thats added to AC to find leaks? I have a small bottle that is oil base.
<O
</OThanks, Joel.
Thread Starter
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Junior User
Joined: Nov 2007
Posts: 89
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From: OR
No mods yet.
I bought a 4" pipe w/cat delete but since the truck is to tall to fit in the garage I'll probably wait till spring to install it. I occasionaly tow a 27' travel trailer over the mtns and would like to put a TW chip in it but I'm worried I'll blow the tranny if I do.
I bought a 4" pipe w/cat delete but since the truck is to tall to fit in the garage I'll probably wait till spring to install it. I occasionaly tow a 27' travel trailer over the mtns and would like to put a TW chip in it but I'm worried I'll blow the tranny if I do.
Post Fiend
Joined: Mar 2007
Posts: 9,010
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From: Johnson City, TN.
I had a similiar miss and it turned out to be leaky uppipes. It got worse and even affected idle. Look around the uppipe connections behind the turbo for black soot and down at the manifolds too.
An unrelated question. Where did you get your thermostat? If you have a 203° thermostat did you get it from thedieselsite. The reason I ask is they are the only ones who make a 203° stat for the '96-'97 crowd. The '94.5 and '95 had a 203° stat factory but the shaft is too short and will fit but doesn't properly work on the '96 and '97's.
An unrelated question. Where did you get your thermostat? If you have a 203° thermostat did you get it from thedieselsite. The reason I ask is they are the only ones who make a 203° stat for the '96-'97 crowd. The '94.5 and '95 had a 203° stat factory but the shaft is too short and will fit but doesn't properly work on the '96 and '97's.
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Junior User
Joined: Nov 2007
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From: OR
Originally Posted by Neal
An unrelated question. Where did you get your thermostat? If you have a 203° thermostat did you get it from thedieselsite. The reason I ask is they are the only ones who make a 203° stat for the '96-'97 crowd. The '94.5 and '95 had a 203° stat factory but the shaft is too short and will fit but doesn't properly work on the '96 and '97's.
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
The short stat is for a 95 and older. You need to get the right one. The short stat can overheat the rear potion of the heads and you won't know it by looking at the temp gage. I'll run just a little hotter but in reality your cooking it.
Here: http://www.dieselsite.com/index.asp?...ROD&ProdID=186
The exhaust leak might not be easy to determine over the normal clanging of the engine. It doesn't take much of a leak to looses power.
Here: http://www.dieselsite.com/index.asp?...ROD&ProdID=186
The exhaust leak might not be easy to determine over the normal clanging of the engine. It doesn't take much of a leak to looses power.
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Junior User
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From: OR
I could swear I read somewhere that a short t-stat was not the big issue it's made out to be but hey, my memory is so bad I'll be lucky to recognize that strange lady at my house tonight
I hope I haven't damaged anything? Luckily I haven't done any towing since I replaced the water pump and t-stat.
I hope I haven't damaged anything? Luckily I haven't done any towing since I replaced the water pump and t-stat.
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Thread Starter
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Junior User
Joined: Nov 2007
Posts: 89
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From: OR
My memory is getting so bad that every day is ground hog day
Look at the bright side,
My memory is now the shortest part of my anatomy
OK all seriousness aside I crawled under and over my truck with a flashlight
and didn't find any soot or signs of leakage on the manifolds or up pipes but did see where fuel was dripping off of the TC inspection cover. separate issue but a problem all the same.
My valve covers have been weeping for years so the build up of crud makes it hard to isolate the source of fuel leakage. I need to put on a rain jacket and pressure wash it at the coin-op car wash.
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Junior User
Joined: Nov 2007
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From: OR
I don’t recall where I read that it was OK to run the short Stant 14252 thermostat but it bothered me so much that I’ve spent the last two hours searching forums and I can’t find a single thread to support my belief.
Just so nobody else gets confused I’m posting a picture of the proper Stant 14269 thermostat vs. the short Stant 14252
The good news for you guys that use a short thermastat, even tho this thermastat is listed as a 195 it's really a 205.
Thanks, Joel.
Just so nobody else gets confused I’m posting a picture of the proper Stant 14269 thermostat vs. the short Stant 14252
The good news for you guys that use a short thermastat, even tho this thermastat is listed as a 195 it's really a 205.
Thanks, Joel.
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
BTW, the leak you saw at the inspection cover is probably coming from the engine valley. You'll spot it after the engine is cleaned up.
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
I don’t recall where I read that it was OK to run the short Stant 14252 thermostat but it bothered me so much that I’ve spent the last two hours searching forums and I can’t find a single thread to support my belief.
Just so nobody else gets confused I’m posting a picture of the proper Stant 14269 thermostat vs. the short Stant 14252
The good news for you guys that use a short thermastat, even tho this thermastat is listed as a 195 it's really a 205.
Thanks, Joel.
Just so nobody else gets confused I’m posting a picture of the proper Stant 14269 thermostat vs. the short Stant 14252
The good news for you guys that use a short thermastat, even tho this thermastat is listed as a 195 it's really a 205.
Thanks, Joel.
