throttle body astra 1.4 - Engine Troubleshooting


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throttle body astra 1.4

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Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

eddie lane
Novice

Feb 23, 2012, 4:08 PM

Post #1 of 5 (2285 views)

throttle body astra 1.4	Sign In

just changed engine on 02 astra 1.4 engine code z14xe. runs wewll drives well idles well the only problem is when i turn the engine off a small amount of pressure comes out of the throttle body and you can here the flap inside open and shut.any idea what it mite be.thanks

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 23, 2012, 8:29 PM

Post #2 of 5 (2245 views)

Re: throttle body astra 1.4	Sign In

Not sure what you mean by pressure coming out of the throttle body?

T

eddie lane
Novice

Feb 24, 2012, 1:40 AM

Post #3 of 5 (2230 views)

Re: throttle body astra 1.4	Sign In

i mean that when i turn the engine off the is a puff of air that comes back through the throttle body.and you can here the flap inside open and shut every time the engine is turned off.thanks

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 24, 2012, 2:23 AM

Post #4 of 5 (2228 views)

Re: throttle body astra 1.4	Sign In

OK - I think I get the idea. Seems like there's one last firing (engine not quite ready to be off) and you have a slight backfire.

Engine may even give you a part turn backwards if you observe it?

Best I can suggest is you may have carbon build up making higher compression than normal perhaps. I suggest making sure all tune-up items are up to date and correct spark plugs are in this car. If they are too hot it could cause that but would think you would notice knocking upon acceleration too.

If this car does all or mostly slow around town type driving it may just need a good run at speed as to blow it out. Not sure the quality of fuel you have available but that could be a factor too.

You could try an aggressive throttle body cleaning with the spray while running and this may quit that or try but not sure the stuff works a solvent to clear out carbon used in the fuel. Don't get too caught up in magic in a bottle but probably couldn't hurt anything.

This probably isn't real good for the engine that this happens or might be harmless - can't say.

Wrong spark plugs if possible may be at fault. I only suggest the exact ones the manufacturer called for and if not that type I'd get those out.

Doesn't matter but they don't sell that car where I am but almost everything does better with original spec tune-up parts,

T

eddie lane
Novice

Feb 24, 2012, 9:44 AM

Post #5 of 5 (2214 views)

Re: throttle body astra 1.4	Sign In

thanks for your help.i live in liverpool uk i will post how i get on.

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