If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
90 Beretta running rough, picks up speed by itself
I'm at work, wife's at home, so I may revise the diagnosis once I've had
a chance to look at the car. Was running fine as of yesterday... (90 Beretta 3.1 V6, auto.) Started running rough this morning, check engine light apparently is flashing, and will gradually increase speed if you take your foot off the gas around 30mph, but takes forever to get up to 30mph because it's running so bad. I'm going to dump the codes, but that sounds like a vacuum leak of some kind, especially because it "just happened." I don't think the car even made it into closed loop, sounds like it was running for all of 30 seconds before it started to run like this. Plugs and wires are a couple years old, probably due, but not horribly old. Air filter was done about 3 months ago. What about ignition coil failure? Would one of them just fail? (It has the pack of three.) Other than an ohmmeter, is there anyway to test them at home? |
Ads |
#2
|
|||
|
|||
90 Beretta running rough, picks up speed by itself
ray Wrote: > I'm at work, wife's at home, so I may revise the diagnosis once I've had > a chance to look at the car. > > Was running fine as of yesterday... > (90 Beretta 3.1 V6, auto.) > > Started running rough this morning, check engine light apparently is > flashing, and will gradually increase speed if you take your foot off > the gas around 30mph, but takes forever to get up to 30mph because it's > running so bad. > > I'm going to dump the codes, but that sounds like a vacuum leak of some > kind, especially because it "just happened." > > I don't think the car even made it into closed loop, sounds like it was > running for all of 30 seconds before it started to run like this. > > Plugs and wires are a couple years old, probably due, but not horribly > old. Air filter was done about 3 months ago. > > What about ignition coil failure? Would one of them just fail? (It has > the pack of three.) Other than an ohmmeter, is there anyway to test > them at home? A lot of those older 3.1s would "sneeze" sometimes on shutting down, or if it didn't start on the first try....when they get older, and the vacuum hoses aren't as tight fitting, that sneeze back through the intake will blow them right off...there is a triple hose plug in on top of the intake that likes to blow off and cause exactly what you are talking about... -- jeffcoslacker ------------------------------------------------------------------------ jeffcoslacker's Profile: http://www.automotiveforums.com/vbul...?userid=219638 View this thread: http://www.automotiveforums.com/vbul...d.php?t=618709 http://www.automotiveforums.com |
#3
|
|||
|
|||
90 Beretta running rough, picks up speed by itself
jeffcoslacker > wrote in
: > > ray Wrote: >> I'm at work, wife's at home, so I may revise the diagnosis once I've had >> a chance to look at the car. >> >> Was running fine as of yesterday... >> (90 Beretta 3.1 V6, auto.) >> >> Started running rough this morning, check engine light apparently is >> flashing, and will gradually increase speed if you take your foot off >> the gas around 30mph, but takes forever to get up to 30mph because it's >> running so bad. >> >> I'm going to dump the codes, but that sounds like a vacuum leak of some >> kind, especially because it "just happened." >> >> I don't think the car even made it into closed loop, sounds like it was >> running for all of 30 seconds before it started to run like this. >> >> Plugs and wires are a couple years old, probably due, but not horribly >> old. Air filter was done about 3 months ago. >> >> What about ignition coil failure? Would one of them just fail? (It has >> the pack of three.) Other than an ohmmeter, is there anyway to test >> them at home? > > A lot of those older 3.1s would "sneeze" sometimes on shutting down, or > if it didn't start on the first try....when they get older, and the > vacuum hoses aren't as tight fitting, that sneeze back through the > intake will blow them right off...there is a triple hose plug in on top > of the intake that likes to blow off and cause exactly what you are > talking about... > > and yes, a coil can and will fail all at once robbing 2 cyls. of spark. you can do all the ohm tests you want but they are all without load so MAY not show failure......test to see if you are actually failing load spark and then move coil on module rack to see if failure moves with suspect coil or stays put....modules fail also!......btw: i would retrieve initual codes b4 ****canning them. all diag. are possibly important.........kjun |
#4
|
|||
|
|||
90 Beretta running rough, picks up speed by itself
jeffcoslacker wrote:
> ray Wrote: > >>I'm at work, wife's at home, so I may revise the diagnosis once I've had >>a chance to look at the car. >> >>Was running fine as of yesterday... >>(90 Beretta 3.1 V6, auto.) >> >>Started running rough this morning, check engine light apparently is >>flashing, and will gradually increase speed if you take your foot off >>the gas around 30mph, but takes forever to get up to 30mph because it's >>running so bad. >> >>I'm going to dump the codes, but that sounds like a vacuum leak of some >>kind, especially because it "just happened." >> >>I don't think the car even made it into closed loop, sounds like it was >>running for all of 30 seconds before it started to run like this. >> >>Plugs and wires are a couple years old, probably due, but not horribly >>old. Air filter was done about 3 months ago. >> >>What about ignition coil failure? Would one of them just fail? (It has >>the pack of three.) Other than an ohmmeter, is there anyway to test >>them at home? > > > A lot of those older 3.1s would "sneeze" sometimes on shutting down, or > if it didn't start on the first try....when they get older, and the > vacuum hoses aren't as tight fitting, that sneeze back through the > intake will blow them right off...there is a triple hose plug in on top > of the intake that likes to blow off and cause exactly what you are > talking about... > > and that's exactly what it was. popped right back on. and yeah, it no longer fits very snug. wonder how many billions the dealer will want for a new one. I'm impressed... you nailed it. Ray |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Prevailing Speed vs Posted Speed Limit | Bob Simon | Driving | 119 | September 1st 06 03:20 PM |
States Boost Speed Limits On Major Highways | gpsman | Driving | 103 | July 28th 06 10:29 PM |
Ah yes - The joys of SLOW DRIVING | Jim Yanik | Driving | 26 | March 22nd 06 01:27 PM |
Where to get Official Speed Limit Info | [email protected] | Driving | 40 | January 3rd 05 07:10 AM |
rec.autos.makers.chrysler FAQ, Part 1/6 | Dr. David Zatz | Chrysler | 10 | December 18th 04 05:15 AM |