Forum Replies Created
-
Replies
-
Another thing I noticed when it does stumble off the line is I lose all vacuum!
Would a hot cat cause more restriction than a cold one?
I do have a thermal camera I can look at the difference in temp, but i’m sure the muffler is fine as there was a piece after cat that had corroded and was open and loud and was having the stumble then too.
I don’t understand how removing the 02 will prove exhaust restriction though, is it because i’m fooling the puter or because i’ve created a hole for exhaust to escape from?I started getting a CES light and ran the codes and got egr, did some digging and found one of the rubber boots that connects a plastic vac line to the egr solenoid was one I split in half to get off and apparently didn’t notice I put it back on. I hoped this was going to fix the issue, but it has not, still have the hesitation.
I installed a tee on this vac line and a gage ran up to the windshield. It was showing in the green, 18-22 inHg, when I first hooked it up, but I went out and got it warm and got it hesitating again on launch. At this point it’s showing just under the green and the gage even says late ign timing as a possible cause, but i’m also worried it’s an intake leak that only pops up after it’s hot.
Next I will try the leak detection test with brake cleaner when it’s hot and showing the symptom, but I also want to check the timing, could a bad ign module be at fault? Would it hurt to retorque the intake bolts?I started getting a CES light and ran the codes and got egr, did some digging and found one of the rubber boots that connects a plastic vac line to the egr solenoid was one I split in half to get off and apparently didn’t notice I put it back on. I hoped this was going to fix the issue, but it has not, still have the hesitation.
I installed a tee on this vac line and a gage ran up to the windshield. It was showing in the green, 18-22 inHg, when I first hooked it up, but I went out and got it warm and got it hesitating again on launch. At this point it’s showing just under the green and the gage even says late ign timing as a possible cause, but i’m also worried it’s an intake leak that only pops up after it’s hot.
Next I will try the leak detection test with brake cleaner when it’s hot and showing the symptom, but I also want to check the timing, could a bad ign module be at fault? Would it hurt to retorque the intake bolts?So I haven’t done much more work, but I did make the 40 minute drive tonight in the truck and it’s still doing it just not nearly as bad.
Will get back to it soon as try to solve this…Edit: The fuel pressure gauge never moved from 9-10 psi during the hesitations.
So I haven’t done much more work, but I did make the 40 minute drive tonight in the truck and it’s still doing it just not nearly as bad.
Will get back to it soon as try to solve this…Edit: The fuel pressure gauge never moved from 9-10 psi during the hesitations.
I should just try a different gas station? Seems like it’s been smelly for a long time and I don’t always use the same station, but I will pay more attention the next time I use one other than the regular one I buy from.
The tbi doesn’t have a vac line on the regulator and the fuel filter was replaced fairly recently. I’d actually love to change it to a different style filter, like a screw on oil type, I really hate the factory setup, any recommendations?
I should just try a different gas station? Seems like it’s been smelly for a long time and I don’t always use the same station, but I will pay more attention the next time I use one other than the regular one I buy from.
The tbi doesn’t have a vac line on the regulator and the fuel filter was replaced fairly recently. I’d actually love to change it to a different style filter, like a screw on oil type, I really hate the factory setup, any recommendations?
Another symptom I keep forgetting to mention is bad smelling exhaust, doesn’t that usually mean too rich?
Another symptom I keep forgetting to mention is bad smelling exhaust, doesn’t that usually mean too rich?
Actually that sounds easy enough, i’ll try it soon and report back. I hope it’s the filter, but I think it has less than 2K miles on it. I know that might not mean anything, but at least now I have a good way to find out…
Actually that sounds easy enough, i’ll try it soon and report back. I hope it’s the filter, but I think it has less than 2K miles on it. I know that might not mean anything, but at least now I have a good way to find out…
Ok, but should I blame low psi on the new regulator or old fuel pump?
BTW I don’t think the regulator is adjustable…Ok, but should I blame low psi on the new regulator or old fuel pump?
BTW I don’t think the regulator is adjustable…I got a fuel pressure gauge and tbi adapter fitting for it. It was actually a pain to get on as the truck has steel lines running from the back of the tbi to the trans bell housing were they are bound together and bolted to one of the trans/engine studs which is hard to get to.
Once freed from this it wasn’t bad, but in the process I may have found the original issue. I found the 3 tbi mount bolts to be not very tight. I think this may have been a result of reusing the original gasket between the tbi and manifold. This would kind of explain the ‘only happens when it’s hot’ symptom and why I didn’t find it when doing the vac leak test (I didn’t test when hot).
It does however show only 10 psi when running and that will drop to like 6 at full throttle or idle, should it be more steady at 10 or more? I thought I read somewhere it should be 9 – 14 psi.
However it hasn’t stumbled off the line yet, but also haven’t done a 30+ minute interstate trip either.I got a fuel pressure gauge and tbi adapter fitting for it. It was actually a pain to get on as the truck has steel lines running from the back of the tbi to the trans bell housing were they are bound together and bolted to one of the trans/engine studs which is hard to get to.
Once freed from this it wasn’t bad, but in the process I may have found the original issue. I found the 3 tbi mount bolts to be not very tight. I think this may have been a result of reusing the original gasket between the tbi and manifold. This would kind of explain the ‘only happens when it’s hot’ symptom and why I didn’t find it when doing the vac leak test (I didn’t test when hot).
It does however show only 10 psi when running and that will drop to like 6 at full throttle or idle, should it be more steady at 10 or more? I thought I read somewhere it should be 9 – 14 psi.
However it hasn’t stumbled off the line yet, but also haven’t done a 30+ minute interstate trip either.