holding back

[corsab12v]

my 1.0 holds back when warmed up after 5 mins of driving it starts to hold back like a missfire but more like the hand brake is being pulled on then off so the car feels like it being draged back for 1 or 2 seconds going up hills its constant it takes a while to get up hills i have noticed if i put the heater on full at hot the problem goes away by 90% but the car is not over heating i dont let it get above 90 temp tryed air flow had a new throttle valve but it oly happens when warmed up its doing my head in anyone had the same problems?

[overheater987]

perhaps dodgy fuel pump is your engine carbed or injected??

[corsab12v]

its injected i think funny you should say that about the fuel pump i think it using alot of fuel i think its went down very quick ill know soon as iam going to fill it up 2morrow is there any way i can test the pump?

[overheater987]

hmmm tbh it should pull up the engine management light, check fuel consumption now you say that you may have a cracked fuel line can you smell petrol in the car, or the afm is not providing the right mix of fuel to air but again em light would be on

[corsab12v]

nope i cant smell fuel i never said i have a cracked fuel line it must have something to do with the car heating up its ok for 5 mins when its cold it doesen't overheat. when its warm if i turn the heater on full hot the the stutering goes away by 90% its only there at slow speeds ie when pulling away and driving slow though the gears just put 2l of antifreeze in today and its still the same.

[richardhhha]

try taking out the spark plugs and seeing if they are tracing

basicaly you will see a black line in the enamel part of the spark plug, i just changed my mates plugs as his car started getting sluggish and felt really weared to drive.

[corsab12v]

just done a full service on it last week when it was in at vaxhall they tryed new plugs