Author Topic: loud knocking and low power at idle and low revs (Read 5109 times)

rov716y · « **on:** October 22, 2007, 11:29:35 am »

as soon as i get passed it she runs smooth as a nut. but in traffic if i settle around the point where she runs smooth/rogh meet she'll kangaroo. as the revs climb and the noise goes i seen to get a surge of power

jtanguay · « **Reply #1 on:** October 22, 2007, 03:18:42 pm »

mine is starting to do that too... i'm pretty sure its pump/timing related.

starrd · « **Reply #2 on:** October 22, 2007, 08:43:38 pm »

Quote from: "rov716y"

as soon as i get passed it she runs smooth as a nut. but in traffic if i settle around the point where she runs smooth/rogh meet she'll kangaroo. as the revs climb and the noise goes i seen to get a surge of power

I had a similar problem and it was "injector Knock". Replaced the bad injector and it ran smooth again.

jtanguay · « **Reply #3 on:** October 22, 2007, 09:43:06 pm »

hmmmm injector 'knock' you say... hmmmm me wonders if i have this 'knock' ... i'm going to investigate!

burn_your_money · « **Reply #4 on:** October 23, 2007, 04:40:16 am »

check for air bubbles in the fuel lines

rov716y · « **Reply #5 on:** October 23, 2007, 09:26:03 am »

no air bubbles!

new filler neck new tank new fuel lines new fuel filter new bosch(second hand of caddy) pump old lucas cav injectors!!!!!

old injectors been sat with engine for 7 years.

how much are new ones?

jtanguay · « **Reply #6 on:** October 23, 2007, 10:16:52 am »

i've got a facet fuel pump. no bubbles whatsoever

i think its probably a bad injector... andy2 helped me change my injectors (he's awesome) and it seemed like one injector was sticking as the car idled like crap. with some high revving of the motor (my ears!!! :lol: ), eventually the injector started firing. the injectors just had new nozzles put on them, and did sit around for a few weeks before install.

rov716y · « **Reply #7 on:** October 23, 2007, 11:46:47 am »

its no 4, i slaken of the rest and the engine dies. but no 4 no difference!! i got 4 lucas injectors in and i got 4 spare bosch ones put them on one by one and she runs the same. so i swaped no 4 injector for no 3 and no 4 cylinder still not firing but no 3 is?!?

so injectors are fine. am now presuming its the pump or the cylinder itself is fecked

bert · « **Reply #8 on:** October 23, 2007, 02:00:17 pm »

Rov me old fruit,if you have a bosch pump you should have bosch injectors :wink:
Your a bit of a lad on the puter bert,upload a video so we can have a gander :idea:
Tea was nice at gaydon,i would have had a burger but didnt trust your cooking :wink: :shock:

Bert

Black Smokin' Diesel · « **Reply #9 on:** October 23, 2007, 06:21:55 pm »

Check valve on the injection pump could be bad. Is fuel coming out of injector line #4?

rabfan · « **Reply #10 on:** October 24, 2007, 07:18:10 pm »

What he said ^

rallydiesel · « **Reply #11 on:** October 24, 2007, 08:13:38 pm »

Sounds kind of like it's running advanced at low rpm and corrects at mid to high rpms. Was it recently re-timed with the cold start cable accidentally left pulled out?

rov716y · « **Reply #12 on:** October 25, 2007, 08:41:35 am »

changed the filter it was full of lard from running on neat veg oil used and new!!

but still the knocking.

i put a new belt on it a little while ago and timed it up.

bosch injectors are on but running the same.

i dont want to start messing with my pump as there a tad complicated a freind sujjested turning the fuel up on the pump to get rid of it. but i aint got a clue how to do that.

will sort out a vid at weekend

bert!!! my cooking is fine! i eat so much i'm a good cook lol

bert · « **Reply #13 on:** October 25, 2007, 11:06:32 am »

:lol:
Bert

rov716y · « **Reply #14 on:** October 25, 2007, 11:54:49 am »

bert

i'm fed up with the car being three diff shades of green with a matt black bonnet so this weekend ( weather permitting) its going an all over shade off blackboard matt black!!