| From | Message |
jteuton
Dodge Dakota
JOIN HERE
7/05/2002
20:30:42
|
 Subject: Extreme Gearheads please help..thanks
IP: Logged
Message:
Ok I have dodge dakota and its running great thanks a lot to a bunch of you on this board. But I just rebuild the motor (top half only) of a 2.0l honda engine. The problem is I put it back together and it idles good. It seems to run good. No unusually noises, doesn't use oil, doesn't ping, sounds like a professionally did it. However the thing lacks serious power. I'm talking about won't pull over 65 up a steep hill. Ok no jokes about...it's cause it's a honda...I need serious help to redeem myself to my mother. She now thinks I know nothing about cars in general. Here are the facts. Fuel to air ratio is perfect so no fuel or air starvation. (Checked them both with meters.) I didn't replace the cat but i don't think the loss in backpressure would cause that much. I did change the fuel filter, rotor & cap, wire, plugs, machined head and cam, new timing belt, new fuel injectors and flush, new air filter. The only thing that has been suggested so far is the cam timing might be off. Ok whats the difference between cam and ignition timing? Is it not the same thing? If not how do I go about checking the cam timing cause I know how to check the Ignition Timing. Any suggestions are very appreciated. I'm sorry its about a Honda but i tried going to some honda boards and OMG they are so clueless when it comes to their engines. I'm still shaking my head. So please help out your dodge dakota brother.. Peace
JTeuton
|
TSU Hemiguy
Dodge Dakota
JOIN HERE
7/05/2002
21:32:48
|  RE: Extreme Gearheads please help..thanks
IP: Logged
Message:
It sounds like crank to cam timing. I had the same problem with a Nissan Pickup. I do not know hondas. You should ask the resident import nut at your local autoparts store to desrcibe how to do it(it is easier to describe face to face).
Hemi=power
|
jteuton
Dodge Dakota
JOIN HERE
7/06/2002
17:53:22
| RE: Extreme Gearheads please help..thanks
IP: Logged
Message:
Ok. I need more help. Is cam timing and igniton timing two seperate things? Can ignition timing be dialed in but your cam timing still be off? I've seen all these things about getting an adjustable cam gear to fix my problem and i'm thinking....can't i do the same thing by turning the distributor......PLEASE HELP....i'm so confused....jteuton
|
DaveR
Dodge Dakota
JOIN HERE
7/06/2002
18:18:46
| RE: Extreme Gearheads please help..thanks
IP: Logged
Message:
I'll throw my hat into the ring on this one since no one else is talking. The cam gear times the valves to the pistons. You don't want your valves opening at the bottom of the stroke. You can't correct this problom by rotating the distributer because the distributor (atleast in pushrod engines) is timed off the cam. Ok, so three things have to be timed to each other: crank, cam, and ignition. If my understanding is correct you need to ge the #1 cylinder to top dead center. From there you then time the cam to this with a degree wheel, and put the timing belt back on. Now you should be able to set your ignition timing. Unfortunatlyi don't understand the degree wheel priciple well enough to explain it in detail. Hope this helped atleast explain what cam timing does.
|
JTeuton
Dodge Dakota
JOIN HERE
7/06/2002
19:09:27
| RE: Extreme Gearheads please help..thanks
IP: Logged
Message:
ok...so cam timing is something different. I've seen people put engines together without a degree wheel so how do they do that? I"ve had everything machined so i don't even know if the machine shop machined around the woodruff key or not. The cam could now be slight advanced or retarded even with this key lined up. But i guess your saying that you can set the timing on the money even with the cam being out of sync with the crank. Hmmm....I'm pretty much screwed cause there isn't any shop in this town with them kind of brains that can degree a cam.....JTeuton
|
Art
Dodge Dakota
JOIN HERE
7/06/2002
19:52:16
| RE: Extreme Gearheads please help..thanks
IP: Logged
Message:
Dont know what your talking about when you say machine off the woodruff key??? uhuh so what you have a timing chain or belt? did you line up the timing marks on the crank and cam sprocket with the timimg chain or belt? alot of engine cam sprockets have diff marks for retarding and advancing the cam,verify that the cam and chain marks are in right spot first, dont worry about ignition timing at this point becasue again alot of engines cam sprocket and crank sprocket marks when timed correctly with the chain or belt will not be at top dead center as relation of piston to valve.Im probably confusing you even more :)
1: make sure the timing chain is in correct timing
2:then you can bring #1 piston to TDC and set the distributor correctly
You could also just have set the distributor timing off 180 and yes the engine will still run but poorly, you can check this by bringing the #1 piston to TDC and see if the corresponding valves are closed
|
DaveR
Dodge Dakota
JOIN HERE
7/06/2002
22:03:54
| RE: Extreme Gearheads please help..thanks
IP: Logged
Message:
I want to know what was machined as far as the keyway. Seems the only thing they could really do is open the keyway up for a bigger key and possibly make it sloppy. If there is an import race shop (real racing, not street racing) they can probobly help you understand it too.
|
OttawaDak
Dodge Dakota
JOIN HERE
7/06/2002
22:43:00
| RE: Extreme Gearheads please help..thanks
IP: Logged
Message:
You've got the right idea - the gear can only go one way on the cam. However, the chain/belt can sit multiple ways on the gear. So to change your valve timing, you skip the chain ahead/back a tooth or two. That's what happens when some old engines jump the timing chain, they move the chain ahead a gear by themselves (because of a loose chain) and you end up with no power or worse - piled up valves.
Cheers!
OttawaDak
|
Greg
Dodge Dakota
JOIN HERE
7/07/2002
01:28:17
| RE: Extreme Gearheads please help..thanks
IP: Logged
Message:
check your timing marks at the balancer. if you look closely the white mark is 10 deg. btdc, and the red mark is 0 deg. something like that. possibly cam timing is wrong, or simply just a timing correction. remember the dist. pick-up also controls the fuel timing. just look closely at the balancer. if your still not sure pull the #1 plug and check if the piston is at tdc. stick a straw or something of the sort down to the piston and turn the motor slowly youll be able to get with in 2 or 3 deg. of tdc, then check witch mark lines up. check cam timing and set ign. timing to spec.
|
JTeuton
Dodge Dakota
JOIN HERE
7/07/2002
13:03:39
| RE: Extreme Gearheads please help..thanks
IP: Logged
Message:
I Nailed it. I advanced the cam timing one tooth (7 or 8 degrees???) and then set the distributor to the point where it idled the highest and that cured everything. It no longer seems sluggish and will actually chirp the front tires now on takeoff. Thanks once again....JTeuton
What i meant about the keyway is....that was my point of reference in terms of lining the cam up with the crank but when they regrinded it...i wasn't sure if he grinded it off the keyway (base reference point) of not so i couldn't tell if the cam was indexed wrong.
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
