whats wrong with it?

[firetruck21]

ok so heres the deal iv got a 96 Nissan hard body 2.4 4x4. last year i put a new trans into it. about last February my oil pump went out about 3 blocks from my apartment so i drove it to a spot and let it sit. i got a new pump into it about the and of February. then we found out that the timing was bad so i fixed that, it was sitting for so long by that time that the back brakes had stuck themselves on the rear end so we got a bunch of guys to sit in the back to break them loose. we took it out and it was bogging a but but still was not good so we opened up the hood and saw that the exost port was glowing red so we decided to take the cat out and that fixed the glowing. right now we have a flexpipe where the cat was. we also chainged the foul filter and foul pressure regulator. so far everything has helped a litle bit but it is still bogging and taking way to much gas to get to the speed desired.
my frind who had an onlder pathfinder had the same problem but could not figure it out. has any one elce had this same problem? and if not any one have any ideas on what it could be?

[03chevy]

does it have a carb. on it. if so then it needs to be rebuilt. my bro in law has a isuzu and it had that problem.

[75K30]

Welcome to the site:

You are falling victom to a troubleshooting technique that many of us do, and for the most part is without reason, ither than a quick fix. These quick fixes end up costing more in the long run, and become rather poor repairs.
I am alays suspicios of an iol pump having to be replaced. I just do not see an oil pump failing, but once in a while it does. Instead other wear items such as bearings can result in poor oil pressure and typically the pump is responsible for this.
Tell us more about the oil pump, and why the determination to change the pump was made.
At this time, you changed the pump and then it was determined that the timing was off. Was this just ignition timing? How did this happen when only the oil pump was changed? Perhaps did the timing chain jump time? THis might explain some of the other problems that you describe.
Now the brakes? Did the brake shoes just get stuck to the drums? How did loading the bed full of guys help this? Other than excersizing the leaf springs, this should have little to do with freeing stuck brake shoes.
This hot exhaust manifold is telling you that ignition timing, cam timing, a vacuum leak is present. Might be a combination of all of the above.
A quick inspection of the cat would have determined whether or not the cat was bad, and that flex hose has got to go.
You replaced the fuel pressure regulator, was this because the regulator provided inadequate fuel pressure? How much pressure did it have when you replaced it? How much pressure do you have now? My guess is that the original unit did not have to be replaced, and I fear that you are throwing parts at this thing in an attempt to find a magic solution.
Grab a nice reair manual, and start some true troubleshooting. The Nissan engine has clear indicators for cam timing, and most manuals are very specific. These little engines are tried and true. Difficult to break one, and almost impossible to wear one out, unless some preventative maintenance has been overlooked / neglected.
Proper troubleshooting is going to get you much better results. Throwing parts at a problem can provide limited success, but usually ends up with spending money on a bunch of unnecessary parts.
Tell us some more. How many miles. Troubleshooting techniques Etc.

[firetruck21]

the oil pump was determined bad from a friend that was going to UTI at the time.
the timing chain was the ignition timing it was stretched and the guides had no more walls left on them, on top of it had skipped time.
the brakes just stuck to the drums by loading the truck up with guys we where able to revers the truck without the back tire just sliding on the ground and was able to brake the stuck brakes.
the glowing manifold was mostly due to the burnt out cat, as soon as we took it off it stopped glowing.
we replaced the fuel pressure regulator because we could not get a tester for it and it was free due to one of my friends having a old spare.

UPDATE
yesterday we checked the timing and it was way off once we got it right it stopped shaking and stopped bogging!!
but now we have a new problem, the timing was so far off that the distributer cant be tightened into place. we would prefer not to take the oil pump or any of the other stuff off the block.
does any one know how to fix that Problem?

[87c10slammer]

smaller belt maybe?... i dont get it why would the timing have anything to do with the alterantor

[firetruck21]

sorry i meant the distributer. i think thats what it is well its the thing that makes the spark plugs spark.

hey i never claimed to know what I'm talking about

[87c10slammer]

sometimes you have to wiggle the distibutor a little to pop it into place.. maybe yo didnt get the oil rod into the distibutor.. it can happen i useually put some sillicon on the distibutor end of the rod and stick it into the dizzy before i put it in then you can turn the dizzy to line it up... if that makes sence

[firetruck21]

so another words i have no choice but to take the oil pump off? the oil pump isn't right but the distributer just is not lining up right

[87c10slammer]

no the oil pump is right... you dont need to take it out.. you need to take the shaft out.. perhaps with a magnit... it just sits ontop of the oil pump inside the distibutr hole.. that isnt lining up with the distibutor so you cant pop it all the way into place

[firetruck21]

i will have to have them try that ill let you know what happens