BlitzxCraig
Member
- :
- Mazda Proteg5
Hello everyone! This is my first post. I am posting here as I have done extensive research about an idling problem I've been having but I can't seem to find anything to match my problem exactly.
So here's the problem- when I start my MP5 cold, the rpms go up to 1500-2000, which is normal for a cold start. They gradually go down to normal operation rpm-about 700-800. However, every now and then, it will drop to almost 100, then jump right up to about 1000 then back to 800. Usually it stops there and runs normally and continues to run normally throughout the day. One time, it did that after I filled it up, and it continued to drop and go back to baseline rpm over and over. Then today, I started it and let it idle to operating temp with no symptoms, but then it suddenly dropped worse than ever before and nearly stalled and the battery dash light came on. It has 148k on it, and I know the plugs and wires were done by PO.
I know that Proteges have common problems with MAF sensors and EGRs, IACV, etc., but I have no check engine light on. I was under the impression that those almost always throw a CEL. Because it happened after a fill-up, I was wondering if it could be a fuel pump problem. Also-the car has no problems with acceleration or mileage, and it has never done the idling thing at stoplights-only when first started, and even then it is intermittent. I am planning on cleaning the MAF sensor and possibly the EGR, and checking vacuum lines. Any other suggestions?
Thanks in advance!
Matthew
So here's the problem- when I start my MP5 cold, the rpms go up to 1500-2000, which is normal for a cold start. They gradually go down to normal operation rpm-about 700-800. However, every now and then, it will drop to almost 100, then jump right up to about 1000 then back to 800. Usually it stops there and runs normally and continues to run normally throughout the day. One time, it did that after I filled it up, and it continued to drop and go back to baseline rpm over and over. Then today, I started it and let it idle to operating temp with no symptoms, but then it suddenly dropped worse than ever before and nearly stalled and the battery dash light came on. It has 148k on it, and I know the plugs and wires were done by PO.
I know that Proteges have common problems with MAF sensors and EGRs, IACV, etc., but I have no check engine light on. I was under the impression that those almost always throw a CEL. Because it happened after a fill-up, I was wondering if it could be a fuel pump problem. Also-the car has no problems with acceleration or mileage, and it has never done the idling thing at stoplights-only when first started, and even then it is intermittent. I am planning on cleaning the MAF sensor and possibly the EGR, and checking vacuum lines. Any other suggestions?
Thanks in advance!
Matthew
