My car recently blew and I was wondering if low compression could cause a hesitation/bucking problem? It did this before it blew when it had low compression. Thanks

 

Why are you still driving around on a hurt motor???


-Ted

 

I think he means that before it blew it had low compression, and exhibited these symptoms. I imagine he wants to know if when it gets back together with higher compression if the problem will still exist? My only advice for ya, is that you need a rebuild, and that should cure most of your woes. Make sure that every thing you hook up to your engine, isn't something that can hurt it. For example, an oil cooler full of gunk could hurt your engine, and you should probably have things like that cleaned.

 

no the hesitation was most likely clogged or broken injectors. Thats why most people always get their injectors rebuilt and flow tested at cruzin performance every few years or they should. 20 year old injectors are a sure fire way to blow you motor.

 

[QUOTE=Bukwild]no the hesitation was most likely clogged or broken injectors. Thats why most people always get their injectors rebuilt and flow tested at cruzin performance every few years or they should. 20 year old injectors are a sure fire way to blow you motor.[/QUOTE

Nope. Just had the primaries cleaned and the secondaries are new. It still did it. I just want to know if I get rebuilt, will it still hesitate?

 

Can you be more specific on the hesitation? RPM specific? Full range? Felt like it had no power? wouldn't rev past XXXX?

 

revs up slowly, bucks under load between 1800 and 4000. It doesnt hit a brick wall.

 

Sounds sorta like mine acts when a rotor cuts out. I'll be drivin along, and BAM... shaky, only responds to slow smooth throttle input, and if you get the revs high enough it fires back over. Sound similar, or did I read you wrong?

 

Yah thats pretty close.

 

My motor is sort of in unknown condition, but the contributing factors I could think on mine are... progressively worse coolant leak (NO smoke, NO coolant loss months ago, now some). I think the rust potential of coolant in my chamber could cause a seal to stick, but would it stick and unstick under throttle(I don't think so, just listing everything I thought of), or my injectors stuck open and flooded it out (usually happened at low RPM, esp low 5th gear). Spark, the plugs aren't bad, but not great either. I bet my wires are pretty poor as well. If I downshifted, it would usually fire back over. My compression is... nothing spectacular. I feel that all or some of these conditions led to the spark being blown out or seal sticking.

Edit: My alt is also weak from trying to charge a dry battery for god knows how long. At traffic lights the volts would drop until the car died, and would need un-flooded. A new battery fixed this, but I think this contributes to the spark situation.

 

Yack, that's what I get for replying when I'm tired. :P
This sucks - I'm supposed to be on vacation! doh


-Ted

 

On vacation? What will this city of stone throwers do without their town crier?

 

Eh, its stupid that he even drove the car with low compression (if you follow his threads).

 

Here is my theory. If the compression is low, then there isnt much vaccum. If the fuel pressure sensor runs off of vaccum then it would read a little off. This would mess up the fuel maps right?

 

No, cause your turbo is producing positive boost under load.


-Ted

 

If it weren't for my horse, I wouldn't have spent that year in college.

 

I dont get it.

 

I didn't either.

 

Does anyone have a definate answer