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Matt
Matt, Mechanical Engineer
Category: Vauxhall
Satisfied Customers: 21727
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Astra h 1.8 2007 wont start when its cold, it turns over and

Customer Question

Astra h 1.8 2007 wont start when its cold, it turns over and does start in the end, starts first time if outside time is above 14/15
Submitted: 9 months ago.
Category: Vauxhall
Expert:  Shantal-Mod replied 9 months ago.
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Expert:  Matt replied 9 months ago.

Hello

This could be incorrect fuelling due to a faulty water temp sensor. If this is the problem then the ECU will be leaving the car constantly ' on choke' and not reducing the fuelling as the engine warms - so unplug the sensor and clean the contacts on both sides with some switch / electrical cleaner (not WD40) and inspect the wiring for any signs of damage to the insulation especially where it runs over other components and through the bulkhead- if this doesn't help consider replacing the sensor as they're not expensive

I'd also replace the spark plugs if any of them fail this checklist:

http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp

Expert:  Matt replied 8 months ago.

Hi

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